./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V --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 f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:46:09,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:46:09,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:46:09,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:46:09,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:46:09,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:46:09,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:46:09,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:46:09,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:46:09,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:46:09,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:46:09,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:46:09,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:46:09,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:46:09,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:46:09,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:46:09,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:46:09,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:46:09,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:46:09,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:46:09,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:46:09,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:46:09,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:46:09,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:46:09,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:46:09,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:46:09,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:46:09,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:46:09,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:46:09,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:46:09,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:46:09,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:46:09,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:46:09,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:46:09,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:46:09,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:46:09,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:46:09,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:46:09,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:46:09,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:46:09,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:46:09,892 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:46:09,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:46:09,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:46:09,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:46:09,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:46:09,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:46:09,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:46:09,935 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:46:09,936 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:46:09,936 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:46:09,936 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:46:09,937 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:46:09,938 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:46:09,938 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:46:09,938 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:46:09,938 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:46:09,939 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:46:09,939 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:46:09,939 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:46:09,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:46:09,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:46:09,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:46:09,941 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:46:09,941 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:46:09,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:46:09,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:46:09,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:46:09,942 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:46:09,942 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:46:09,942 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:46:09,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:46:09,943 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:46:09,943 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:46:09,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:46:09,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:46:09,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:46:09,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:46:09,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:46:09,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:46:09,945 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:46:09,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:46:09,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:46:09,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:46:09,947 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_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 [2021-11-23 03:46:10,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:46:10,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:46:10,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:46:10,294 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:46:10,295 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:46:10,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-11-23 03:46:10,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/data/1f7d85b1d/abc633b0ce884edeb993b25cc242bc3f/FLAG879ae3ec4 [2021-11-23 03:46:10,855 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:46:10,860 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-11-23 03:46:10,876 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/data/1f7d85b1d/abc633b0ce884edeb993b25cc242bc3f/FLAG879ae3ec4 [2021-11-23 03:46:11,182 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/data/1f7d85b1d/abc633b0ce884edeb993b25cc242bc3f [2021-11-23 03:46:11,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:46:11,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:46:11,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:46:11,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:46:11,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:46:11,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@352b9088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11, skipping insertion in model container [2021-11-23 03:46:11,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:46:11,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:46:11,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:46:11,548 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:46:11,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:46:11,618 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:46:11,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11 WrapperNode [2021-11-23 03:46:11,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:46:11,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:46:11,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:46:11,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:46:11,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,682 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-23 03:46:11,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:46:11,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:46:11,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:46:11,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:46:11,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:46:11,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:46:11,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:46:11,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:46:11,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (1/1) ... [2021-11-23 03:46:11,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:46:11,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:11,751 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:46:11,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:46:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:46:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:46:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:46:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:46:11,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:46:11,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:46:11,921 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:46:11,923 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:46:12,114 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:46:12,167 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:46:12,168 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:46:12,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:46:12 BoogieIcfgContainer [2021-11-23 03:46:12,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:46:12,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:46:12,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:46:12,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:46:12,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:46:11" (1/3) ... [2021-11-23 03:46:12,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f32bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:46:12, skipping insertion in model container [2021-11-23 03:46:12,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:11" (2/3) ... [2021-11-23 03:46:12,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f32bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:46:12, skipping insertion in model container [2021-11-23 03:46:12,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:46:12" (3/3) ... [2021-11-23 03:46:12,188 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2021-11-23 03:46:12,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:46:12,194 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-23 03:46:12,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:46:12,246 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 [2021-11-23 03:46:12,246 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-23 03:46:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 2.3) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 03:46:12,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:12,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 03:46:12,266 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)] === [2021-11-23 03:46:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:12,272 INFO L85 PathProgramCache]: Analyzing trace with hash 105340, now seen corresponding path program 1 times [2021-11-23 03:46:12,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:12,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723131813] [2021-11-23 03:46:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:12,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:12,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:12,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723131813] [2021-11-23 03:46:12,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723131813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:12,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:12,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:46:12,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909997231] [2021-11-23 03:46:12,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:12,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:46:12,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:12,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:46:12,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:46:12,476 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 2.3) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-11-23 03:46:12,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:12,523 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-23 03:46:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:46:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 03:46:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:12,533 INFO L225 Difference]: With dead ends: 21 [2021-11-23 03:46:12,533 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 03:46:12,535 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 [2021-11-23 03:46:12,538 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:12,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 03:46:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 03:46:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 2.0) 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) [2021-11-23 03:46:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-23 03:46:12,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 3 [2021-11-23 03:46:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:12,569 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-23 03:46:12,569 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) [2021-11-23 03:46:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-23 03:46:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:46:12,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:12,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:46:12,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:46:12,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:12,572 INFO L85 PathProgramCache]: Analyzing trace with hash 3267810, now seen corresponding path program 1 times [2021-11-23 03:46:12,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:12,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548798918] [2021-11-23 03:46:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:12,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:12,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:12,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548798918] [2021-11-23 03:46:12,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548798918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:12,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:12,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:46:12,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116684554] [2021-11-23 03:46:12,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:12,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:46:12,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:12,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:46:12,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:46:12,642 INFO L87 Difference]: Start difference. First operand 19 states and 20 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) [2021-11-23 03:46:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:12,678 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-23 03:46:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:46:12,679 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 [2021-11-23 03:46:12,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:12,680 INFO L225 Difference]: With dead ends: 17 [2021-11-23 03:46:12,680 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:46:12,681 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 [2021-11-23 03:46:12,683 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:12,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:46:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 03:46:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.8) 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) [2021-11-23 03:46:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-23 03:46:12,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2021-11-23 03:46:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:12,695 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-23 03:46:12,696 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) [2021-11-23 03:46:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-23 03:46:12,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:46:12,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:12,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:46:12,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:46:12,699 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:12,702 INFO L85 PathProgramCache]: Analyzing trace with hash 3267811, now seen corresponding path program 1 times [2021-11-23 03:46:12,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:12,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412462695] [2021-11-23 03:46:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:12,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:12,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:12,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412462695] [2021-11-23 03:46:12,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412462695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:12,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:12,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:46:12,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713045946] [2021-11-23 03:46:12,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:12,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:46:12,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:12,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:46:12,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:46:12,816 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 1.0) 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) [2021-11-23 03:46:12,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:12,860 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-23 03:46:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:46:12,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) 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 [2021-11-23 03:46:12,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:12,863 INFO L225 Difference]: With dead ends: 20 [2021-11-23 03:46:12,863 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:46:12,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:46:12,867 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:12,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 16 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:46:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-23 03:46:12,871 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) [2021-11-23 03:46:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-23 03:46:12,871 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2021-11-23 03:46:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:12,872 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-23 03:46:12,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) 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) [2021-11-23 03:46:12,872 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-23 03:46:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:46:12,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:12,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:46:12,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:46:12,873 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash 3266345, now seen corresponding path program 1 times [2021-11-23 03:46:12,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:12,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976090915] [2021-11-23 03:46:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:12,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:12,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:12,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976090915] [2021-11-23 03:46:12,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976090915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:12,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:12,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:46:12,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509190589] [2021-11-23 03:46:12,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:12,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:46:12,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:12,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:46:12,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:46:12,979 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) [2021-11-23 03:46:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:13,051 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-23 03:46:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:46:13,051 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 [2021-11-23 03:46:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:13,052 INFO L225 Difference]: With dead ends: 19 [2021-11-23 03:46:13,053 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 03:46:13,053 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 [2021-11-23 03:46:13,058 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:13,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 03:46:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 03:46:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.6666666666666667) 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) [2021-11-23 03:46:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-23 03:46:13,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2021-11-23 03:46:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:13,071 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-23 03:46:13,071 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) [2021-11-23 03:46:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-23 03:46:13,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:46:13,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:13,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:46:13,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:46:13,072 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:13,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1155966095, now seen corresponding path program 1 times [2021-11-23 03:46:13,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:13,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034482288] [2021-11-23 03:46:13,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:13,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:13,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:13,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034482288] [2021-11-23 03:46:13,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034482288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:13,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320219035] [2021-11-23 03:46:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:13,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:13,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:13,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:13,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:46:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:46:13,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:13,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:13,626 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 22 treesize of output 18 [2021-11-23 03:46:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:13,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320219035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:13,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566157051] [2021-11-23 03:46:13,718 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-23 03:46:13,719 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:13,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:13,728 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:13,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:13,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:13,870 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 [2021-11-23 03:46:13,977 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 23 treesize of output 19 [2021-11-23 03:46:14,119 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 23 treesize of output 19 [2021-11-23 03:46:14,165 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 23 treesize of output 19 [2021-11-23 03:46:14,243 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:14,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '232#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|) (+ |ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset|)) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= |ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:14,743 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:14,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:14,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2021-11-23 03:46:14,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109984349] [2021-11-23 03:46:14,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:14,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:46:14,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:14,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:46:14,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:46:14,746 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 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) [2021-11-23 03:46:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:14,872 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-23 03:46:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:46:14,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 03:46:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:14,873 INFO L225 Difference]: With dead ends: 17 [2021-11-23 03:46:14,873 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:46:14,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:46:14,875 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:14,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 17 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:46:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-23 03:46:14,877 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) [2021-11-23 03:46:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-23 03:46:14,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2021-11-23 03:46:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:14,879 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-23 03:46:14,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 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) [2021-11-23 03:46:14,880 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-23 03:46:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:46:14,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:14,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:14,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:15,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:15,091 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1475209664, now seen corresponding path program 1 times [2021-11-23 03:46:15,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:15,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309382515] [2021-11-23 03:46:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:15,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:15,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:15,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309382515] [2021-11-23 03:46:15,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309382515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:15,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:15,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:46:15,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214463667] [2021-11-23 03:46:15,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:15,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:46:15,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:15,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:46:15,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:46:15,128 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:15,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:15,151 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-23 03:46:15,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:46:15,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:46:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:15,152 INFO L225 Difference]: With dead ends: 15 [2021-11-23 03:46:15,153 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 03:46:15,153 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 [2021-11-23 03:46:15,154 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:15,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 03:46:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 03:46:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) 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) [2021-11-23 03:46:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-23 03:46:15,157 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 7 [2021-11-23 03:46:15,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:15,157 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-23 03:46:15,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-23 03:46:15,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:46:15,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:15,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:15,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:46:15,158 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1475209663, now seen corresponding path program 1 times [2021-11-23 03:46:15,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:15,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639371077] [2021-11-23 03:46:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:15,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:15,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:15,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639371077] [2021-11-23 03:46:15,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639371077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345109159] [2021-11-23 03:46:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:15,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:15,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:15,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:15,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:46:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:15,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:46:15,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:15,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:15,452 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 20 treesize of output 16 [2021-11-23 03:46:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:15,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345109159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:15,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [454542038] [2021-11-23 03:46:15,483 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:46:15,483 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:15,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:15,484 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:15,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:15,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,554 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 [2021-11-23 03:46:15,622 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 23 treesize of output 19 [2021-11-23 03:46:15,702 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 23 treesize of output 19 [2021-11-23 03:46:15,745 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 23 treesize of output 19 [2021-11-23 03:46:15,823 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 [2021-11-23 03:46:15,856 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:16,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [454542038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:16,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:16,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 4, 4] total 13 [2021-11-23 03:46:16,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550710576] [2021-11-23 03:46:16,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:16,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:46:16,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:16,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:46:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:46:16,350 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:16,422 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-23 03:46:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:46:16,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:46:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:16,423 INFO L225 Difference]: With dead ends: 19 [2021-11-23 03:46:16,423 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 03:46:16,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:46:16,424 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:16,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 9 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 03:46:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-11-23 03:46:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.4166666666666667) 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) [2021-11-23 03:46:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-23 03:46:16,427 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 7 [2021-11-23 03:46:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:16,428 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-23 03:46:16,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-23 03:46:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:46:16,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:16,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:16,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:16,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:16,629 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:16,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:16,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1513140689, now seen corresponding path program 1 times [2021-11-23 03:46:16,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:16,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314327916] [2021-11-23 03:46:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:16,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:46:16,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:16,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314327916] [2021-11-23 03:46:16,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314327916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:16,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:16,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:46:16,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997851040] [2021-11-23 03:46:16,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:16,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:46:16,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:46:16,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:46:16,709 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:16,744 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-23 03:46:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:46:16,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-23 03:46:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:16,745 INFO L225 Difference]: With dead ends: 15 [2021-11-23 03:46:16,746 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 03:46:16,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:46:16,747 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:16,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 03:46:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 03:46:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) 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) [2021-11-23 03:46:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-23 03:46:16,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2021-11-23 03:46:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:16,750 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-23 03:46:16,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-23 03:46:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:46:16,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:16,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:16,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:46:16,751 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:16,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1513140690, now seen corresponding path program 1 times [2021-11-23 03:46:16,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:16,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934057367] [2021-11-23 03:46:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:16,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:16,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:16,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934057367] [2021-11-23 03:46:16,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934057367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:16,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914716756] [2021-11-23 03:46:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:16,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:16,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:16,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:16,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:46:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:16,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:46:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:16,921 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:46:16,921 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 21 treesize of output 22 [2021-11-23 03:46:16,927 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 20 treesize of output 18 [2021-11-23 03:46:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:17,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:17,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914716756] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:17,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:46:17,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 11 [2021-11-23 03:46:17,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756267986] [2021-11-23 03:46:17,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:17,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:46:17,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:17,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:46:17,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:46:17,178 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:17,238 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-23 03:46:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:46:17,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-23 03:46:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:17,239 INFO L225 Difference]: With dead ends: 16 [2021-11-23 03:46:17,239 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 03:46:17,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:46:17,242 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:17,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 5 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 03:46:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 03:46:17,245 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) [2021-11-23 03:46:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-23 03:46:17,245 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-11-23 03:46:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:17,246 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-23 03:46:17,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-23 03:46:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:46:17,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:17,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:17,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:17,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:17,462 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:17,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1865709960, now seen corresponding path program 1 times [2021-11-23 03:46:17,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:17,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979471429] [2021-11-23 03:46:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:17,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:17,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:17,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979471429] [2021-11-23 03:46:17,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979471429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:17,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627507145] [2021-11-23 03:46:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:17,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:17,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:17,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:17,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:46:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:17,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:46:17,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:17,738 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 20 treesize of output 16 [2021-11-23 03:46:17,781 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-23 03:46:17,782 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 23 treesize of output 16 [2021-11-23 03:46:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:17,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:17,823 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 13 treesize of output 11 [2021-11-23 03:46:17,826 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 20 treesize of output 18 [2021-11-23 03:46:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:17,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627507145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:17,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1082312697] [2021-11-23 03:46:17,937 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:46:17,937 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:17,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:17,938 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:17,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:18,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:18,004 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 [2021-11-23 03:46:18,051 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 23 treesize of output 19 [2021-11-23 03:46:18,117 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 23 treesize of output 19 [2021-11-23 03:46:18,164 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 23 treesize of output 19 [2021-11-23 03:46:18,224 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 [2021-11-23 03:46:18,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:18,329 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:46:18,329 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 [2021-11-23 03:46:18,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:18,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:18,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:18,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:18,463 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:46:18,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2021-11-23 03:46:18,579 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:46:18,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:46:18,708 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:20,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '591#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:20,164 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:20,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:20,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2021-11-23 03:46:20,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345802143] [2021-11-23 03:46:20,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:20,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:46:20,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:20,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:46:20,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:46:20,167 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2021-11-23 03:46:20,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:20,279 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-23 03:46:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:46:20,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) Word has length 10 [2021-11-23 03:46:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:20,281 INFO L225 Difference]: With dead ends: 23 [2021-11-23 03:46:20,281 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 03:46:20,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:46:20,283 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:20,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2021-11-23 03:46:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 03:46:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-23 03:46:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 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) [2021-11-23 03:46:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-23 03:46:20,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2021-11-23 03:46:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:20,290 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-23 03:46:20,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2021-11-23 03:46:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-23 03:46:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:46:20,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:20,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:20,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 03:46:20,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:20,502 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:20,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:20,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2002450371, now seen corresponding path program 1 times [2021-11-23 03:46:20,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:20,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748981923] [2021-11-23 03:46:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:20,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:46:20,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:20,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748981923] [2021-11-23 03:46:20,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748981923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:20,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:20,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:46:20,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761583778] [2021-11-23 03:46:20,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:20,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:46:20,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:20,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:46:20,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:46:20,551 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:20,568 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-23 03:46:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:46:20,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:46:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:20,569 INFO L225 Difference]: With dead ends: 21 [2021-11-23 03:46:20,569 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 03:46:20,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:46:20,570 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:20,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:20,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 03:46:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 03:46:20,577 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) [2021-11-23 03:46:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-23 03:46:20,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-11-23 03:46:20,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:20,579 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-23 03:46:20,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-23 03:46:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:46:20,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:20,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:20,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:46:20,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash -346987898, now seen corresponding path program 2 times [2021-11-23 03:46:20,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:20,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976323400] [2021-11-23 03:46:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:20,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:20,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:20,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976323400] [2021-11-23 03:46:20,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976323400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:20,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211436020] [2021-11-23 03:46:20,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:46:20,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:20,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:20,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:20,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:46:20,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:46:20,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:20,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:46:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:20,763 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 33 treesize of output 29 [2021-11-23 03:46:20,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:46:20,831 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 36 treesize of output 36 [2021-11-23 03:46:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:46:20,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:21,077 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 39 treesize of output 37 [2021-11-23 03:46:21,085 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 45 treesize of output 43 [2021-11-23 03:46:21,092 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 37 treesize of output 29 [2021-11-23 03:46:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:46:21,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211436020] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:21,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1398523084] [2021-11-23 03:46:21,119 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:46:21,119 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:21,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:21,120 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:21,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:21,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:21,171 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 [2021-11-23 03:46:21,217 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 23 treesize of output 19 [2021-11-23 03:46:21,268 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 23 treesize of output 19 [2021-11-23 03:46:21,295 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 23 treesize of output 19 [2021-11-23 03:46:21,357 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 [2021-11-23 03:46:21,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:21,451 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:46:21,452 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 [2021-11-23 03:46:21,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:21,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:21,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:21,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:21,592 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-23 03:46:21,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2021-11-23 03:46:21,674 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:46:21,675 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 [2021-11-23 03:46:21,775 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:23,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '768#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:23,075 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:23,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:23,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2021-11-23 03:46:23,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679385725] [2021-11-23 03:46:23,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:23,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:46:23,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:23,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:46:23,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:46:23,078 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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) [2021-11-23 03:46:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:23,180 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-23 03:46:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:46:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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 [2021-11-23 03:46:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:23,181 INFO L225 Difference]: With dead ends: 20 [2021-11-23 03:46:23,181 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:46:23,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:46:23,182 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:23,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 3 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2021-11-23 03:46:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:46:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-23 03:46:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2) 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) [2021-11-23 03:46:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-23 03:46:23,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2021-11-23 03:46:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:23,185 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-23 03:46:23,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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) [2021-11-23 03:46:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-23 03:46:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:46:23,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:23,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:23,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:23,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 03:46:23,399 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:23,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2128277037, now seen corresponding path program 1 times [2021-11-23 03:46:23,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:23,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982125822] [2021-11-23 03:46:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:23,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:23,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:23,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982125822] [2021-11-23 03:46:23,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982125822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:23,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723605530] [2021-11-23 03:46:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:23,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:23,499 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:23,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:46:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:23,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:46:23,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:23,567 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:46:23,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-11-23 03:46:23,571 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 20 treesize of output 18 [2021-11-23 03:46:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:23,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:24,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723605530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:24,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205158594] [2021-11-23 03:46:24,080 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:46:24,081 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:24,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:24,081 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:24,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:24,127 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 [2021-11-23 03:46:24,164 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 20 treesize of output 16 [2021-11-23 03:46:24,209 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 23 treesize of output 19 [2021-11-23 03:46:24,236 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 23 treesize of output 19 [2021-11-23 03:46:24,300 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 [2021-11-23 03:46:24,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:24,391 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:46:24,391 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 [2021-11-23 03:46:24,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:24,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:24,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:24,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:24,538 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:46:24,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2021-11-23 03:46:24,640 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:46:24,641 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 [2021-11-23 03:46:24,729 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:25,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '908#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:25,972 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:25,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:25,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2021-11-23 03:46:25,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338484405] [2021-11-23 03:46:25,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:25,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:46:25,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:25,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:46:25,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:46:25,976 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 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) [2021-11-23 03:46:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:26,154 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-23 03:46:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:46:26,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 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 [2021-11-23 03:46:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:26,155 INFO L225 Difference]: With dead ends: 18 [2021-11-23 03:46:26,155 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 03:46:26,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:46:26,157 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:26,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2021-11-23 03:46:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 03:46:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 03:46:26,159 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) [2021-11-23 03:46:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-23 03:46:26,159 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2021-11-23 03:46:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:26,160 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-23 03:46:26,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 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) [2021-11-23 03:46:26,160 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-23 03:46:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:46:26,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:26,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 03:46:26,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:26,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 03:46:26,371 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash 869799955, now seen corresponding path program 3 times [2021-11-23 03:46:26,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:26,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640621260] [2021-11-23 03:46:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:26,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:26,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:26,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640621260] [2021-11-23 03:46:26,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640621260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:26,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780608704] [2021-11-23 03:46:26,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:46:26,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:26,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:26,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:46:26,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:46:26,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:26,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 03:46:26,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:26,762 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 [2021-11-23 03:46:26,766 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 [2021-11-23 03:46:26,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:46:26,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:46:26,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:46:26,935 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 21 treesize of output 13 [2021-11-23 03:46:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:26,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:27,054 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 77 treesize of output 71 [2021-11-23 03:46:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:27,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780608704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801962565] [2021-11-23 03:46:27,291 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:46:27,291 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:27,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:27,292 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:27,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:27,335 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 [2021-11-23 03:46:27,381 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 20 treesize of output 16 [2021-11-23 03:46:27,427 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 23 treesize of output 19 [2021-11-23 03:46:27,453 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 23 treesize of output 19 [2021-11-23 03:46:27,503 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 [2021-11-23 03:46:27,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:27,599 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:46:27,600 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 [2021-11-23 03:46:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:27,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:27,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:27,707 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:46:27,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2021-11-23 03:46:27,801 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:46:27,801 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 [2021-11-23 03:46:27,879 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:29,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1071#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:29,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:29,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:29,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 23 [2021-11-23 03:46:29,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037645852] [2021-11-23 03:46:29,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:29,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 03:46:29,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:29,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 03:46:29,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:46:29,090 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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) [2021-11-23 03:46:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:29,468 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-23 03:46:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:46:29,469 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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) Word has length 15 [2021-11-23 03:46:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:29,469 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:46:29,469 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 03:46:29,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:46:29,471 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:29,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 199 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2021-11-23 03:46:29,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 03:46:29,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-23 03:46:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) 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) [2021-11-23 03:46:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-23 03:46:29,474 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2021-11-23 03:46:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:29,474 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-23 03:46:29,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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) [2021-11-23 03:46:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-23 03:46:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:46:29,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:29,476 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 03:46:29,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:29,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 03:46:29,703 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:29,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:29,703 INFO L85 PathProgramCache]: Analyzing trace with hash 645895365, now seen corresponding path program 4 times [2021-11-23 03:46:29,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:29,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843023674] [2021-11-23 03:46:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:29,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:29,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843023674] [2021-11-23 03:46:29,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843023674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780663530] [2021-11-23 03:46:29,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:46:29,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:29,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:29,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:29,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:46:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:29,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:46:29,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:30,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:30,134 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 7 treesize of output 5 [2021-11-23 03:46:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:30,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780663530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:30,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [196784625] [2021-11-23 03:46:30,154 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:46:30,154 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:30,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:30,154 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:30,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:30,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:30,197 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 [2021-11-23 03:46:30,241 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 23 treesize of output 19 [2021-11-23 03:46:30,279 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 23 treesize of output 19 [2021-11-23 03:46:30,304 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 23 treesize of output 19 [2021-11-23 03:46:30,347 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 [2021-11-23 03:46:30,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:30,419 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:46:30,420 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 [2021-11-23 03:46:30,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:30,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:30,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:30,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:30,533 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:46:30,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 54 [2021-11-23 03:46:30,615 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:46:30,615 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 [2021-11-23 03:46:30,694 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:31,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1262#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:31,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:31,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:31,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-11-23 03:46:31,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763847802] [2021-11-23 03:46:31,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:31,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:46:31,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:46:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:46:31,849 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 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) [2021-11-23 03:46:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:32,045 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-23 03:46:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:46:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 03:46:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:32,048 INFO L225 Difference]: With dead ends: 25 [2021-11-23 03:46:32,048 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 03:46:32,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 03:46:32,049 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 75 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:32,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 03:46:32,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-23 03:46:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-23 03:46:32,053 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-11-23 03:46:32,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:32,053 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-23 03:46:32,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 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) [2021-11-23 03:46:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-23 03:46:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:46:32,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:32,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 03:46:32,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:32,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 03:46:32,254 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:32,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1452080178, now seen corresponding path program 2 times [2021-11-23 03:46:32,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:32,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887433263] [2021-11-23 03:46:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:32,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:32,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:32,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887433263] [2021-11-23 03:46:32,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887433263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:32,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171394009] [2021-11-23 03:46:32,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:46:32,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:32,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:32,367 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:32,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:46:32,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:46:32,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:32,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 03:46:32,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:32,449 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 [2021-11-23 03:46:32,454 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 13 treesize of output 14 [2021-11-23 03:46:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:46:32,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:46:33,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171394009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:33,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1768379806] [2021-11-23 03:46:33,010 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:46:33,011 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:33,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:33,011 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:33,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:33,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:46:33,085 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 23 treesize of output 19 [2021-11-23 03:46:33,127 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 23 treesize of output 19 [2021-11-23 03:46:33,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:46:33,200 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 [2021-11-23 03:46:33,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:33,277 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:46:33,278 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 [2021-11-23 03:46:33,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:33,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:33,404 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:46:33,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2021-11-23 03:46:33,484 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:46:33,484 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 [2021-11-23 03:46:33,562 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:34,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1450#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:34,879 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:34,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:34,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2021-11-23 03:46:34,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769505836] [2021-11-23 03:46:34,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:34,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:46:34,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:34,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:46:34,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-11-23 03:46:34,881 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:35,371 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-23 03:46:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:46:35,372 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 03:46:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:35,372 INFO L225 Difference]: With dead ends: 31 [2021-11-23 03:46:35,373 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 03:46:35,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:46:35,374 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:35,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 2 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 156 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2021-11-23 03:46:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 03:46:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-23 03:46:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-23 03:46:35,379 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2021-11-23 03:46:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:35,379 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-23 03:46:35,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-23 03:46:35,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:46:35,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:35,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-23 03:46:35,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:35,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 03:46:35,581 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:35,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:35,582 INFO L85 PathProgramCache]: Analyzing trace with hash 415320436, now seen corresponding path program 5 times [2021-11-23 03:46:35,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:35,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458194639] [2021-11-23 03:46:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:35,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:35,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:35,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458194639] [2021-11-23 03:46:35,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458194639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:35,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897448448] [2021-11-23 03:46:35,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:46:35,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:35,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:35,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:35,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:46:35,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:46:35,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:35,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 03:46:35,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:35,873 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 [2021-11-23 03:46:36,013 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 21 treesize of output 17 [2021-11-23 03:46:36,070 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 28 treesize of output 27 [2021-11-23 03:46:36,133 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-23 03:46:36,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 03:46:36,158 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 [2021-11-23 03:46:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:36,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:44,753 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 177 treesize of output 171 [2021-11-23 03:46:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:44,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897448448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:44,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1869848366] [2021-11-23 03:46:45,001 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:46:45,001 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:45,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:45,001 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:45,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,043 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 [2021-11-23 03:46:45,080 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 23 treesize of output 19 [2021-11-23 03:46:45,123 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 23 treesize of output 19 [2021-11-23 03:46:45,149 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 23 treesize of output 19 [2021-11-23 03:46:45,208 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 [2021-11-23 03:46:45,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:45,303 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:46:45,303 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 [2021-11-23 03:46:45,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:45,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:45,420 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-23 03:46:45,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2021-11-23 03:46:45,494 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:46:45,494 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 [2021-11-23 03:46:45,615 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:46,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1681#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:46,899 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:46,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:46,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 25 [2021-11-23 03:46:46,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524669093] [2021-11-23 03:46:46,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:46,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:46:46,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:46:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=945, Unknown=9, NotChecked=0, Total=1056 [2021-11-23 03:46:46,901 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:47,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:47,288 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-11-23 03:46:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:46:47,288 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 03:46:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:47,289 INFO L225 Difference]: With dead ends: 42 [2021-11-23 03:46:47,289 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 03:46:47,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=200, Invalid=1597, Unknown=9, NotChecked=0, Total=1806 [2021-11-23 03:46:47,290 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:47,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 43 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 214 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2021-11-23 03:46:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 03:46:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-23 03:46:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-23 03:46:47,294 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 20 [2021-11-23 03:46:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:47,294 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-23 03:46:47,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-23 03:46:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:46:47,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:47,295 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-23 03:46:47,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:47,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 03:46:47,506 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2133191682, now seen corresponding path program 6 times [2021-11-23 03:46:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:47,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175117391] [2021-11-23 03:46:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:47,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:47,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175117391] [2021-11-23 03:46:47,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175117391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271035590] [2021-11-23 03:46:47,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:46:47,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:47,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:47,648 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:47,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:46:47,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:46:47,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:47,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:46:47,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:47,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:47,951 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 7 treesize of output 5 [2021-11-23 03:46:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:47,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271035590] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:47,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83362773] [2021-11-23 03:46:47,969 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:46:47,970 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:47,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:47,970 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:47,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:48,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,009 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 [2021-11-23 03:46:48,055 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 23 treesize of output 19 [2021-11-23 03:46:48,091 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 23 treesize of output 19 [2021-11-23 03:46:48,120 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 23 treesize of output 19 [2021-11-23 03:46:48,166 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 [2021-11-23 03:46:48,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:48,239 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:46:48,240 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 [2021-11-23 03:46:48,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:48,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:48,373 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-23 03:46:48,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2021-11-23 03:46:48,456 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:46:48,456 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 [2021-11-23 03:46:48,531 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:49,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1935#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:49,666 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:49,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:49,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2021-11-23 03:46:49,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597881382] [2021-11-23 03:46:49,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:49,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 03:46:49,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:49,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 03:46:49,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:46:49,667 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:49,904 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-23 03:46:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:46:49,904 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 03:46:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:49,905 INFO L225 Difference]: With dead ends: 31 [2021-11-23 03:46:49,905 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 03:46:49,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 03:46:49,906 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 83 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:49,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 1 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 03:46:49,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 03:46:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-23 03:46:49,915 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2021-11-23 03:46:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:49,915 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-23 03:46:49,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-23 03:46:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:46:49,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:49,918 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-23 03:46:49,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:50,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 03:46:50,134 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:46:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1577274647, now seen corresponding path program 7 times [2021-11-23 03:46:50,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:50,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047081665] [2021-11-23 03:46:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:50,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:50,418 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:50,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047081665] [2021-11-23 03:46:50,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047081665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:50,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120189090] [2021-11-23 03:46:50,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:46:50,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:50,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:50,420 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:50,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:46:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:50,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 03:46:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:50,506 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 [2021-11-23 03:46:50,718 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 27 treesize of output 23 [2021-11-23 03:46:50,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:46:50,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:46:50,930 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:46:50,930 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 23 treesize of output 22 [2021-11-23 03:46:50,994 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 [2021-11-23 03:46:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:51,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:51,699 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstpcpy_#t~mem4#1| Int) (|ULTIMATE.start_cstpcpy_~to#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base|) |ULTIMATE.start_cstpcpy_~to#1.offset| |ULTIMATE.start_cstpcpy_#t~mem4#1|)) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-11-23 03:47:00,204 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstpcpy_#t~mem4#1| Int) (|v_ULTIMATE.start_cstpcpy_#t~mem4#1_92| Int) (|v_ULTIMATE.start_cstpcpy_~to#1.offset_72| Int) (|ULTIMATE.start_cstpcpy_~to#1.offset| Int)) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base|) |ULTIMATE.start_cstpcpy_~to#1.offset| |ULTIMATE.start_cstpcpy_#t~mem4#1|) |v_ULTIMATE.start_cstpcpy_~to#1.offset_72| |v_ULTIMATE.start_cstpcpy_#t~mem4#1_92|)) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)))) is different from false [2021-11-23 03:47:06,280 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 6336 treesize of output 6240 [2021-11-23 03:47:06,514 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 03:47:06,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1966904796] [2021-11-23 03:47:06,516 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:06,516 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:06,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:06,516 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:06,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:06,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:06,551 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 [2021-11-23 03:47:06,584 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 20 treesize of output 16 [2021-11-23 03:47:06,644 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 23 treesize of output 19 [2021-11-23 03:47:06,670 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 23 treesize of output 19 [2021-11-23 03:47:06,728 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 [2021-11-23 03:47:06,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:06,816 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:06,817 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 [2021-11-23 03:47:06,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:06,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:06,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:06,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:06,916 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:47:06,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 54 [2021-11-23 03:47:06,987 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:06,987 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 [2021-11-23 03:47:07,058 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:08,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2163#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:08,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:08,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:47:08,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-23 03:47:08,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277450568] [2021-11-23 03:47:08,304 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:08,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:47:08,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:47:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1352, Unknown=21, NotChecked=150, Total=1640 [2021-11-23 03:47:08,305 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-11-23 03:47:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:08,618 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-11-23 03:47:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:47:08,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) Word has length 25 [2021-11-23 03:47:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:08,619 INFO L225 Difference]: With dead ends: 47 [2021-11-23 03:47:08,619 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 03:47:08,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=175, Invalid=1974, Unknown=21, NotChecked=182, Total=2352 [2021-11-23 03:47:08,621 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:08,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 29 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:47:08,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 03:47:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-23 03:47:08,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-23 03:47:08,624 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2021-11-23 03:47:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:08,624 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-23 03:47:08,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-11-23 03:47:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-23 03:47:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:47:08,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:08,626 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-23 03:47:08,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:08,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:08,842 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:47:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1182526647, now seen corresponding path program 8 times [2021-11-23 03:47:08,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:08,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485224081] [2021-11-23 03:47:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:08,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:09,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:09,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485224081] [2021-11-23 03:47:09,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485224081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:09,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554059086] [2021-11-23 03:47:09,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:47:09,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:09,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:09,015 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:09,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:47:09,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 03:47:09,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:47:09,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 03:47:09,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:09,098 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 [2021-11-23 03:47:09,105 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 [2021-11-23 03:47:09,211 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 [2021-11-23 03:47:09,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 03:47:09,266 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 23 treesize of output 22 [2021-11-23 03:47:09,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 03:47:09,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:47:09,316 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 19 treesize of output 19 [2021-11-23 03:47:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 03:47:09,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:14,138 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 1323 treesize of output 1307 [2021-11-23 03:47:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 15 refuted. 7 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 03:47:19,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554059086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2007835372] [2021-11-23 03:47:19,824 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:19,824 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:19,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:19,825 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:19,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:19,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:19,866 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 [2021-11-23 03:47:19,905 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 20 treesize of output 16 [2021-11-23 03:47:19,957 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 23 treesize of output 19 [2021-11-23 03:47:19,976 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 23 treesize of output 19 [2021-11-23 03:47:20,025 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 [2021-11-23 03:47:20,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:20,092 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:20,092 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 [2021-11-23 03:47:20,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:20,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:20,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:20,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:20,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:20,204 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:47:20,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 54 [2021-11-23 03:47:20,265 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:20,265 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 [2021-11-23 03:47:20,382 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:21,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2448#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:21,602 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:21,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:21,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 8] total 24 [2021-11-23 03:47:21,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280261214] [2021-11-23 03:47:21,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:21,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:47:21,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:21,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:47:21,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=939, Unknown=6, NotChecked=0, Total=1056 [2021-11-23 03:47:21,603 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:21,970 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-23 03:47:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:47:21,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 03:47:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:21,971 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:47:21,971 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 03:47:21,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=309, Invalid=1665, Unknown=6, NotChecked=0, Total=1980 [2021-11-23 03:47:21,972 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:21,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 206 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-11-23 03:47:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 03:47:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 03:47:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-11-23 03:47:21,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-11-23 03:47:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:21,976 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-11-23 03:47:21,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-11-23 03:47:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 03:47:21,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:21,977 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2021-11-23 03:47:22,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:22,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:22,202 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:47:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:22,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1732346243, now seen corresponding path program 3 times [2021-11-23 03:47:22,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:22,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407997043] [2021-11-23 03:47:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:22,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:22,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:22,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407997043] [2021-11-23 03:47:22,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407997043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:22,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559146519] [2021-11-23 03:47:22,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:47:22,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:22,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:22,391 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:22,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 03:47:22,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:47:22,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:47:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 03:47:22,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:22,456 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:47:22,456 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 [2021-11-23 03:47:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:22,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:22,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559146519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:22,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609949316] [2021-11-23 03:47:22,988 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:22,989 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:22,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:22,989 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:22,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:23,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,020 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 [2021-11-23 03:47:23,056 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 20 treesize of output 16 [2021-11-23 03:47:23,087 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 23 treesize of output 19 [2021-11-23 03:47:23,107 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 23 treesize of output 19 [2021-11-23 03:47:23,166 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 [2021-11-23 03:47:23,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:23,229 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:23,230 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 [2021-11-23 03:47:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:23,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:23,321 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-23 03:47:23,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2021-11-23 03:47:23,382 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:23,382 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 [2021-11-23 03:47:23,442 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:24,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2766#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:24,640 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:24,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:24,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 36 [2021-11-23 03:47:24,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318595890] [2021-11-23 03:47:24,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:24,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 03:47:24,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 03:47:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 03:47:24,642 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:24,889 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-23 03:47:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:47:24,889 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-23 03:47:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:24,890 INFO L225 Difference]: With dead ends: 52 [2021-11-23 03:47:24,890 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 03:47:24,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=427, Invalid=2123, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 03:47:24,891 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:24,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 2 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:47:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 03:47:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-11-23 03:47:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-23 03:47:24,895 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2021-11-23 03:47:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:24,895 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-23 03:47:24,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-23 03:47:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:47:24,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:24,897 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2021-11-23 03:47:24,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:25,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 03:47:25,115 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:47:25,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:25,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1987225035, now seen corresponding path program 4 times [2021-11-23 03:47:25,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:25,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984422010] [2021-11-23 03:47:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:25,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:25,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:25,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984422010] [2021-11-23 03:47:25,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984422010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:25,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77479418] [2021-11-23 03:47:25,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:47:25,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:25,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:25,318 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:25,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 03:47:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:25,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 03:47:25,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:25,395 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:47:25,395 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 21 treesize of output 22 [2021-11-23 03:47:25,399 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 20 treesize of output 18 [2021-11-23 03:47:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:26,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:26,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77479418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:26,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075958573] [2021-11-23 03:47:26,613 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:26,613 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:26,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:26,613 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:26,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,646 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 [2021-11-23 03:47:26,685 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 20 treesize of output 16 [2021-11-23 03:47:26,726 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 23 treesize of output 19 [2021-11-23 03:47:26,750 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 23 treesize of output 19 [2021-11-23 03:47:26,804 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 [2021-11-23 03:47:26,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:26,873 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:26,874 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 [2021-11-23 03:47:26,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:26,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:26,995 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-23 03:47:26,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2021-11-23 03:47:27,066 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:27,066 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 [2021-11-23 03:47:27,116 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:28,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3109#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:28,500 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:28,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:28,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2021-11-23 03:47:28,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741684006] [2021-11-23 03:47:28,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:28,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 03:47:28,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:28,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 03:47:28,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2278, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 03:47:28,502 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 43 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) [2021-11-23 03:47:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:28,836 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-11-23 03:47:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:47:28,837 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 43 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 33 [2021-11-23 03:47:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:28,838 INFO L225 Difference]: With dead ends: 37 [2021-11-23 03:47:28,838 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 03:47:28,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=417, Invalid=3123, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 03:47:28,840 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:28,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2021-11-23 03:47:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 03:47:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 03:47:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) 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) [2021-11-23 03:47:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-23 03:47:28,852 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2021-11-23 03:47:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:28,853 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-23 03:47:28,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 43 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) [2021-11-23 03:47:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-23 03:47:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 03:47:28,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:28,856 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2021-11-23 03:47:28,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:29,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 03:47:29,078 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:47:29,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash 408199480, now seen corresponding path program 5 times [2021-11-23 03:47:29,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:29,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372808556] [2021-11-23 03:47:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:29,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:29,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:29,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372808556] [2021-11-23 03:47:29,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372808556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:29,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638660673] [2021-11-23 03:47:29,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:47:29,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:29,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:29,326 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:29,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 03:47:29,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 03:47:29,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:47:29,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 03:47:29,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:29,524 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:47:29,524 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 [2021-11-23 03:47:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 57 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:30,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 57 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:30,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638660673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:30,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106471858] [2021-11-23 03:47:30,425 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:30,425 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:30,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:30,426 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:30,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:30,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:30,461 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 [2021-11-23 03:47:30,499 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 20 treesize of output 16 [2021-11-23 03:47:30,537 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 23 treesize of output 19 [2021-11-23 03:47:30,561 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 23 treesize of output 19 [2021-11-23 03:47:30,596 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 [2021-11-23 03:47:30,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:30,667 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:30,667 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 [2021-11-23 03:47:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:30,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:30,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:30,758 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:47:30,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2021-11-23 03:47:30,822 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:30,822 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 [2021-11-23 03:47:30,903 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:32,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3466#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:32,222 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:32,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:32,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2021-11-23 03:47:32,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432643776] [2021-11-23 03:47:32,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:32,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-23 03:47:32,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-23 03:47:32,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 03:47:32,225 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:32,595 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-11-23 03:47:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:47:32,596 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 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 [2021-11-23 03:47:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:32,596 INFO L225 Difference]: With dead ends: 60 [2021-11-23 03:47:32,596 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 03:47:32,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=541, Invalid=2651, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 03:47:32,598 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:32,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 2 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:47:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 03:47:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-23 03:47:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) 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) [2021-11-23 03:47:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-23 03:47:32,602 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-11-23 03:47:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:32,602 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-23 03:47:32,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-23 03:47:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 03:47:32,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:32,603 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2021-11-23 03:47:32,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:32,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 03:47:32,826 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:47:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:32,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1936615366, now seen corresponding path program 6 times [2021-11-23 03:47:32,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:32,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085635820] [2021-11-23 03:47:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:32,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 25 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:33,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:33,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085635820] [2021-11-23 03:47:33,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085635820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:33,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735832015] [2021-11-23 03:47:33,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:47:33,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:33,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:33,092 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:33,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 03:47:33,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:47:33,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:47:33,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 03:47:33,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:33,164 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 [2021-11-23 03:47:33,170 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 13 treesize of output 14 [2021-11-23 03:47:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:34,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:34,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735832015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:34,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777898195] [2021-11-23 03:47:34,639 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:34,639 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:34,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:34,639 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:34,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:34,667 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 [2021-11-23 03:47:34,695 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 23 treesize of output 19 [2021-11-23 03:47:34,730 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 23 treesize of output 19 [2021-11-23 03:47:34,762 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 23 treesize of output 19 [2021-11-23 03:47:34,804 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 [2021-11-23 03:47:34,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:34,862 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:34,863 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 [2021-11-23 03:47:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:34,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:34,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:34,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:34,951 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:47:34,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 54 [2021-11-23 03:47:35,038 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:35,039 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 [2021-11-23 03:47:35,105 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:36,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3860#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:36,594 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:36,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:36,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 48 [2021-11-23 03:47:36,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280307520] [2021-11-23 03:47:36,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:36,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 03:47:36,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:36,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 03:47:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2893, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 03:47:36,597 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 49 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:37,109 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-23 03:47:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 03:47:37,110 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 49 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-23 03:47:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:37,110 INFO L225 Difference]: With dead ends: 43 [2021-11-23 03:47:37,110 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 03:47:37,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=481, Invalid=3941, Unknown=0, NotChecked=0, Total=4422 [2021-11-23 03:47:37,112 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:37,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2021-11-23 03:47:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 03:47:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-11-23 03:47:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-23 03:47:37,115 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2021-11-23 03:47:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:37,115 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-23 03:47:37,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 49 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-23 03:47:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 03:47:37,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:37,116 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-23 03:47:37,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:37,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 03:47:37,322 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:47:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:37,323 INFO L85 PathProgramCache]: Analyzing trace with hash -587309561, now seen corresponding path program 7 times [2021-11-23 03:47:37,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:37,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781174059] [2021-11-23 03:47:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:37,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 58 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:37,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781174059] [2021-11-23 03:47:37,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781174059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934105501] [2021-11-23 03:47:37,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:47:37,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:37,579 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:37,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 03:47:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:37,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 03:47:37,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:37,672 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:47:37,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:47:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 77 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:38,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 70 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:38,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934105501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:38,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1120951424] [2021-11-23 03:47:38,457 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:38,457 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:38,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:38,458 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:38,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:38,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:38,488 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 [2021-11-23 03:47:38,528 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 20 treesize of output 16 [2021-11-23 03:47:38,574 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 23 treesize of output 19 [2021-11-23 03:47:38,602 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 23 treesize of output 19 [2021-11-23 03:47:38,647 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 [2021-11-23 03:47:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:38,707 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:38,708 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 [2021-11-23 03:47:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:38,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:38,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:38,779 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:47:38,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2021-11-23 03:47:38,835 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:38,835 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 [2021-11-23 03:47:38,887 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:40,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4261#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:40,127 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:40,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:40,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 46 [2021-11-23 03:47:40,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357303609] [2021-11-23 03:47:40,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:40,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 03:47:40,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 03:47:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2433, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 03:47:40,129 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:40,417 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-11-23 03:47:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:47:40,417 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-23 03:47:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:40,418 INFO L225 Difference]: With dead ends: 68 [2021-11-23 03:47:40,418 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 03:47:40,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=665, Invalid=3241, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 03:47:40,419 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:40,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 2 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:47:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 03:47:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-11-23 03:47:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-23 03:47:40,422 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2021-11-23 03:47:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:40,422 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-23 03:47:40,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-23 03:47:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 03:47:40,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:40,423 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2021-11-23 03:47:40,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:40,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:40,638 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:47:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1533050937, now seen corresponding path program 8 times [2021-11-23 03:47:40,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:40,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644169824] [2021-11-23 03:47:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:40,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:40,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:40,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644169824] [2021-11-23 03:47:40,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644169824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:40,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792642352] [2021-11-23 03:47:40,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:47:40,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:40,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:40,912 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:40,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 03:47:41,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 03:47:41,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:47:41,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-23 03:47:41,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:41,170 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 [2021-11-23 03:47:41,176 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 13 treesize of output 14 [2021-11-23 03:47:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 03:47:41,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 03:47:42,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792642352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:42,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433370746] [2021-11-23 03:47:42,384 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:42,384 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:42,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:42,385 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:42,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:42,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:42,422 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 [2021-11-23 03:47:42,446 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 20 treesize of output 16 [2021-11-23 03:47:42,476 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 23 treesize of output 19 [2021-11-23 03:47:42,498 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 23 treesize of output 19 [2021-11-23 03:47:42,540 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 [2021-11-23 03:47:42,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:42,599 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:42,600 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 [2021-11-23 03:47:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:42,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:42,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:42,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:42,688 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-23 03:47:42,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2021-11-23 03:47:42,754 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:42,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:47:42,804 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:44,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4692#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:44,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:44,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:44,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 40 [2021-11-23 03:47:44,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587453139] [2021-11-23 03:47:44,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:44,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-23 03:47:44,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-23 03:47:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2099, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 03:47:44,202 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 41 states, 40 states have (on average 2.475) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:46,261 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-11-23 03:47:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 03:47:46,261 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.475) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-23 03:47:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:46,262 INFO L225 Difference]: With dead ends: 68 [2021-11-23 03:47:46,262 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 03:47:46,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=988, Invalid=5332, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 03:47:46,264 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 155 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:46,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 2 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 758 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2021-11-23 03:47:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 03:47:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-23 03:47:46,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-11-23 03:47:46,272 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 43 [2021-11-23 03:47:46,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:46,272 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-11-23 03:47:46,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.475) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-11-23 03:47:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 03:47:46,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:46,273 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 8, 1, 1, 1, 1, 1] [2021-11-23 03:47:46,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:46,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:46,494 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:47:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:46,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2109315257, now seen corresponding path program 9 times [2021-11-23 03:47:46,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:46,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331006818] [2021-11-23 03:47:46,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:46,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 253 proven. 86 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 03:47:46,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:46,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331006818] [2021-11-23 03:47:46,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331006818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:46,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749856168] [2021-11-23 03:47:46,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:47:46,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:46,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:46,828 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:46,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 03:47:46,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:47:46,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:47:46,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 03:47:46,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:46,933 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:47:46,933 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 [2021-11-23 03:47:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 275 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 03:47:47,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 267 proven. 72 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 03:47:47,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749856168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:47,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798555221] [2021-11-23 03:47:47,904 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:47,905 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:47,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:47,905 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:47,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:47,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:47,933 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 [2021-11-23 03:47:47,968 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 20 treesize of output 16 [2021-11-23 03:47:47,998 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 23 treesize of output 19 [2021-11-23 03:47:48,018 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 23 treesize of output 19 [2021-11-23 03:47:48,060 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 [2021-11-23 03:47:48,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:48,119 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:48,120 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 [2021-11-23 03:47:48,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:48,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:48,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:48,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:48,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:48,214 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-23 03:47:48,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2021-11-23 03:47:48,276 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:48,276 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 [2021-11-23 03:47:48,326 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:49,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5345#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:49,599 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:49,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:49,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 51 [2021-11-23 03:47:49,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134161452] [2021-11-23 03:47:49,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:49,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 03:47:49,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:49,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 03:47:49,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 03:47:49,601 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:49,980 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-11-23 03:47:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:47:49,984 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 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 67 [2021-11-23 03:47:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:49,984 INFO L225 Difference]: With dead ends: 97 [2021-11-23 03:47:49,984 INFO L226 Difference]: Without dead ends: 71 [2021-11-23 03:47:49,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=805, Invalid=3887, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 03:47:49,985 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:49,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:47:49,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-23 03:47:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-11-23 03:47:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-23 03:47:49,989 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2021-11-23 03:47:49,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:49,989 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-23 03:47:49,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:49,989 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-23 03:47:49,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 03:47:49,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:49,990 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 9, 9, 1, 1, 1, 1, 1] [2021-11-23 03:47:50,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:50,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 03:47:50,194 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:47:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash -609582997, now seen corresponding path program 10 times [2021-11-23 03:47:50,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:50,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925216205] [2021-11-23 03:47:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:50,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 269 proven. 106 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 03:47:50,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925216205] [2021-11-23 03:47:50,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925216205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541232459] [2021-11-23 03:47:50,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:47:50,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:50,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:50,563 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:50,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 03:47:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 03:47:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:50,686 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:47:50,686 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 [2021-11-23 03:47:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 294 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 03:47:51,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 285 proven. 90 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 03:47:51,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541232459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:51,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762804653] [2021-11-23 03:47:51,901 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:51,901 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:51,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:51,901 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:51,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:51,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:51,930 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 [2021-11-23 03:47:51,959 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 23 treesize of output 19 [2021-11-23 03:47:51,992 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 23 treesize of output 19 [2021-11-23 03:47:52,010 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 23 treesize of output 19 [2021-11-23 03:47:52,045 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 [2021-11-23 03:47:52,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:52,117 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:52,117 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 [2021-11-23 03:47:52,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:52,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:52,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:52,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:52,206 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-23 03:47:52,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2021-11-23 03:47:52,263 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:52,264 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 [2021-11-23 03:47:52,330 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:53,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6004#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:53,613 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:53,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:53,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 56 [2021-11-23 03:47:53,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543865453] [2021-11-23 03:47:53,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:53,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 03:47:53,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 03:47:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3416, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 03:47:53,614 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 56 states, 56 states have (on average 2.25) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:54,108 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-11-23 03:47:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:47:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.25) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 03:47:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:54,109 INFO L225 Difference]: With dead ends: 102 [2021-11-23 03:47:54,109 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 03:47:54,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=959, Invalid=4591, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 03:47:54,111 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:54,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 2 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:47:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 03:47:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-11-23 03:47:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-11-23 03:47:54,121 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2021-11-23 03:47:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:54,121 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-11-23 03:47:54,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.25) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:47:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-11-23 03:47:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 03:47:54,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:54,123 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 10, 10, 1, 1, 1, 1, 1] [2021-11-23 03:47:54,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:54,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 03:47:54,338 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:47:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:54,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2130689123, now seen corresponding path program 11 times [2021-11-23 03:47:54,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:54,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365041431] [2021-11-23 03:47:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:54,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 282 proven. 128 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 03:47:54,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365041431] [2021-11-23 03:47:54,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365041431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056641549] [2021-11-23 03:47:54,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:47:54,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:54,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:54,771 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:54,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 03:47:56,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-23 03:47:56,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:47:56,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-23 03:47:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:56,151 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:47:56,162 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 [2021-11-23 03:47:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 345 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:57,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 345 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:57,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056641549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1118728180] [2021-11-23 03:47:57,981 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:47:57,981 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:57,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:57,981 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:57,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:58,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:58,015 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 [2021-11-23 03:47:58,039 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:47:58,081 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 23 treesize of output 19 [2021-11-23 03:47:58,102 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 23 treesize of output 19 [2021-11-23 03:47:58,138 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 [2021-11-23 03:47:58,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:58,204 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:47:58,204 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 [2021-11-23 03:47:58,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:58,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:58,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:58,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:58,287 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:47:58,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2021-11-23 03:47:58,344 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:47:58,344 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 [2021-11-23 03:47:58,412 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:59,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6699#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:47:59,799 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:47:59,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:59,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30, 30] total 71 [2021-11-23 03:47:59,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381098135] [2021-11-23 03:47:59,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:47:59,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-23 03:47:59,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:59,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-23 03:47:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1094, Invalid=5068, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 03:47:59,801 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 71 states, 71 states have (on average 2.380281690140845) internal successors, (169), 71 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:00,981 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2021-11-23 03:48:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-23 03:48:00,982 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.380281690140845) internal successors, (169), 71 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 03:48:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:00,982 INFO L225 Difference]: With dead ends: 163 [2021-11-23 03:48:00,983 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 03:48:00,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2155, Invalid=9187, Unknown=0, NotChecked=0, Total=11342 [2021-11-23 03:48:00,985 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 52 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:00,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 2 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:48:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 03:48:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-23 03:48:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) 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) [2021-11-23 03:48:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-23 03:48:00,988 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 71 [2021-11-23 03:48:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:00,988 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-23 03:48:00,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.380281690140845) internal successors, (169), 71 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-23 03:48:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 03:48:00,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:00,989 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2021-11-23 03:48:01,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 03:48:01,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:01,189 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:48:01,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:01,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1856493641, now seen corresponding path program 12 times [2021-11-23 03:48:01,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:01,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76173730] [2021-11-23 03:48:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:01,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 196 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:48:01,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:01,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76173730] [2021-11-23 03:48:01,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76173730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:01,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770236402] [2021-11-23 03:48:01,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:48:01,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:01,950 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:01,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 03:48:02,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:48:02,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:48:02,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-23 03:48:02,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:02,064 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:48:02,064 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 13 treesize of output 18 [2021-11-23 03:48:02,079 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 [2021-11-23 03:48:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 240 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:48:04,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 256 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:48:06,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770236402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:48:06,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671012828] [2021-11-23 03:48:06,744 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:48:06,744 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:48:06,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:48:06,744 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:48:06,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:48:06,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:06,787 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 [2021-11-23 03:48:06,829 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 23 treesize of output 19 [2021-11-23 03:48:06,865 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 23 treesize of output 19 [2021-11-23 03:48:06,889 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 23 treesize of output 19 [2021-11-23 03:48:06,934 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 [2021-11-23 03:48:06,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:06,985 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:48:06,985 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 [2021-11-23 03:48:07,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:07,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:07,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:07,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:07,081 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-23 03:48:07,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2021-11-23 03:48:07,135 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:48:07,135 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 [2021-11-23 03:48:07,186 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:48:09,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7605#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:48:09,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:48:09,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:48:09,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 102 [2021-11-23 03:48:09,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446307443] [2021-11-23 03:48:09,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:48:09,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-23 03:48:09,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:09,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-23 03:48:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=11155, Unknown=0, NotChecked=0, Total=12210 [2021-11-23 03:48:09,077 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 103 states, 102 states have (on average 2.4215686274509802) internal successors, (247), 103 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:10,453 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-11-23 03:48:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 03:48:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 2.4215686274509802) internal successors, (247), 103 states have internal predecessors, (247), 0 states have call successors, (0), 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 83 [2021-11-23 03:48:10,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:10,454 INFO L225 Difference]: With dead ends: 88 [2021-11-23 03:48:10,454 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 03:48:10,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4750 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1741, Invalid=15029, Unknown=0, NotChecked=0, Total=16770 [2021-11-23 03:48:10,457 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:10,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 857 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2021-11-23 03:48:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 03:48:10,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-23 03:48:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-11-23 03:48:10,460 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 83 [2021-11-23 03:48:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:10,460 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-11-23 03:48:10,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 2.4215686274509802) internal successors, (247), 103 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-11-23 03:48:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 03:48:10,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:10,462 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2021-11-23 03:48:10,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 03:48:10,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:10,690 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:48:10,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:10,691 INFO L85 PathProgramCache]: Analyzing trace with hash 508197540, now seen corresponding path program 13 times [2021-11-23 03:48:10,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:10,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419603337] [2021-11-23 03:48:10,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:10,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 346 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:48:11,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:11,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419603337] [2021-11-23 03:48:11,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419603337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:11,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363654139] [2021-11-23 03:48:11,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:48:11,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:11,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:11,344 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:11,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 03:48:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-23 03:48:11,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:11,467 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:48:11,467 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 [2021-11-23 03:48:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 392 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:48:12,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 376 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:48:13,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363654139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:48:13,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063795106] [2021-11-23 03:48:13,913 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:48:13,913 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:48:13,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:48:13,913 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:48:13,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:48:13,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,941 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 [2021-11-23 03:48:13,979 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 23 treesize of output 19 [2021-11-23 03:48:14,009 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 23 treesize of output 19 [2021-11-23 03:48:14,033 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 23 treesize of output 19 [2021-11-23 03:48:14,067 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 [2021-11-23 03:48:14,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,133 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:48:14,133 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 [2021-11-23 03:48:14,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,221 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:48:14,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2021-11-23 03:48:14,296 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:48:14,296 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 [2021-11-23 03:48:14,345 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:48:15,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8429#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:48:15,836 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:48:15,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:48:15,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 91 [2021-11-23 03:48:15,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125412550] [2021-11-23 03:48:15,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:48:15,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-23 03:48:15,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-23 03:48:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1554, Invalid=8148, Unknown=0, NotChecked=0, Total=9702 [2021-11-23 03:48:15,838 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 91 states, 91 states have (on average 2.2747252747252746) internal successors, (207), 91 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:16,732 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-11-23 03:48:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 03:48:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.2747252747252746) internal successors, (207), 91 states have internal predecessors, (207), 0 states have call successors, (0), 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 86 [2021-11-23 03:48:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:16,733 INFO L225 Difference]: With dead ends: 140 [2021-11-23 03:48:16,733 INFO L226 Difference]: Without dead ends: 90 [2021-11-23 03:48:16,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3825 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2429, Invalid=11143, Unknown=0, NotChecked=0, Total=13572 [2021-11-23 03:48:16,734 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 62 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:16,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 2 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:48:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-23 03:48:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-23 03:48:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-11-23 03:48:16,737 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2021-11-23 03:48:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:16,737 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-11-23 03:48:16,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.2747252747252746) internal successors, (207), 91 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-11-23 03:48:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 03:48:16,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:16,738 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2021-11-23 03:48:16,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 03:48:16,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-23 03:48:16,942 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:48:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:16,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1320074830, now seen corresponding path program 14 times [2021-11-23 03:48:16,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:16,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860001514] [2021-11-23 03:48:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:16,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 225 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:48:17,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:17,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860001514] [2021-11-23 03:48:17,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860001514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:17,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175379029] [2021-11-23 03:48:17,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:48:17,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:17,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:17,792 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:17,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 03:48:25,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-23 03:48:25,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:48:25,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-23 03:48:25,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:25,692 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:48:25,693 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 13 treesize of output 18 [2021-11-23 03:48:25,702 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 [2021-11-23 03:48:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 03:48:27,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 03:48:28,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175379029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:48:28,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1006430373] [2021-11-23 03:48:28,913 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:48:28,913 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:48:28,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:48:28,913 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:48:28,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:48:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:28,941 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 [2021-11-23 03:48:28,973 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 20 treesize of output 16 [2021-11-23 03:48:29,000 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 23 treesize of output 19 [2021-11-23 03:48:29,022 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 23 treesize of output 19 [2021-11-23 03:48:29,067 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 [2021-11-23 03:48:29,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:29,134 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:48:29,134 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 [2021-11-23 03:48:29,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:29,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:29,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:29,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:29,216 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:48:29,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 54 [2021-11-23 03:48:29,296 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:48:29,297 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 [2021-11-23 03:48:29,362 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:48:31,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9301#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:48:31,195 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:48:31,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:48:31,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 21, 21] total 76 [2021-11-23 03:48:31,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074868614] [2021-11-23 03:48:31,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:48:31,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-23 03:48:31,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-23 03:48:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=6356, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 03:48:31,197 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 77 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:39,560 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-11-23 03:48:39,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-23 03:48:39,560 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 77 states have internal predecessors, (198), 0 states have call successors, (0), 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 [2021-11-23 03:48:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:39,561 INFO L225 Difference]: With dead ends: 140 [2021-11-23 03:48:39,561 INFO L226 Difference]: Without dead ends: 140 [2021-11-23 03:48:39,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4565 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=3796, Invalid=19156, Unknown=0, NotChecked=0, Total=22952 [2021-11-23 03:48:39,562 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 267 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2847 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:39,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 2 Invalid, 3070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2847 Invalid, 0 Unknown, 76 Unchecked, 1.3s Time] [2021-11-23 03:48:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-23 03:48:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-23 03:48:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2021-11-23 03:48:39,566 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 88 [2021-11-23 03:48:39,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:39,566 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2021-11-23 03:48:39,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 77 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2021-11-23 03:48:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 03:48:39,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:39,568 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 17, 17, 1, 1, 1, 1, 1] [2021-11-23 03:48:39,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 03:48:39,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-23 03:48:39,782 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:48:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:39,783 INFO L85 PathProgramCache]: Analyzing trace with hash 740413851, now seen corresponding path program 15 times [2021-11-23 03:48:39,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:39,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729433221] [2021-11-23 03:48:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:39,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 1225 proven. 338 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 03:48:40,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:40,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729433221] [2021-11-23 03:48:40,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729433221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:40,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166476466] [2021-11-23 03:48:40,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:48:40,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:40,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:40,613 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:40,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 03:48:40,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:48:40,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:48:40,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-23 03:48:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:40,779 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:48:40,779 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 [2021-11-23 03:48:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 1274 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 03:48:42,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 1257 proven. 306 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 03:48:43,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166476466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:48:43,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [854360882] [2021-11-23 03:48:43,628 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:48:43,628 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:48:43,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:48:43,628 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:48:43,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:48:43,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:43,662 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 [2021-11-23 03:48:43,690 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 23 treesize of output 19 [2021-11-23 03:48:43,721 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 23 treesize of output 19 [2021-11-23 03:48:43,744 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 23 treesize of output 19 [2021-11-23 03:48:43,785 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 [2021-11-23 03:48:43,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:43,839 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:48:43,839 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 [2021-11-23 03:48:43,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:43,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:43,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:43,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:43,945 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-23 03:48:43,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2021-11-23 03:48:43,992 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:48:43,992 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 [2021-11-23 03:48:44,048 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:48:45,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10648#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:48:45,597 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:48:45,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:48:45,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 96 [2021-11-23 03:48:45,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619128428] [2021-11-23 03:48:45,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:48:45,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-23 03:48:45,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:45,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-23 03:48:45,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1724, Invalid=8988, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 03:48:45,600 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 96 states, 96 states have (on average 2.3125) internal successors, (222), 96 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:46,473 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2021-11-23 03:48:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 03:48:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.3125) internal successors, (222), 96 states have internal predecessors, (222), 0 states have call successors, (0), 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 139 [2021-11-23 03:48:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:46,475 INFO L225 Difference]: With dead ends: 196 [2021-11-23 03:48:46,475 INFO L226 Difference]: Without dead ends: 143 [2021-11-23 03:48:46,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 351 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4221 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2695, Invalid=12311, Unknown=0, NotChecked=0, Total=15006 [2021-11-23 03:48:46,477 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 72 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:46,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 2 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:48:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-23 03:48:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-11-23 03:48:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2021-11-23 03:48:46,481 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 139 [2021-11-23 03:48:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:46,481 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2021-11-23 03:48:46,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.3125) internal successors, (222), 96 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2021-11-23 03:48:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-23 03:48:46,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:46,483 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 18, 18, 1, 1, 1, 1, 1] [2021-11-23 03:48:46,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 03:48:46,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-23 03:48:46,690 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:48:46,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:46,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1036670797, now seen corresponding path program 16 times [2021-11-23 03:48:46,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:46,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300316612] [2021-11-23 03:48:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:46,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 1268 proven. 376 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:48:47,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:47,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300316612] [2021-11-23 03:48:47,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300316612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:47,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338672555] [2021-11-23 03:48:47,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:48:47,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:47,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:47,666 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:47,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 03:48:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:47,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-23 03:48:47,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:47,840 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:48:47,840 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 [2021-11-23 03:48:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 1320 proven. 324 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:48:49,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 1302 proven. 342 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:48:50,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338672555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:48:50,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220204318] [2021-11-23 03:48:50,931 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:48:50,931 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:48:50,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:48:50,931 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:48:50,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:48:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:50,968 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 [2021-11-23 03:48:50,996 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 20 treesize of output 16 [2021-11-23 03:48:51,027 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 23 treesize of output 19 [2021-11-23 03:48:51,047 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:48:51,085 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 [2021-11-23 03:48:51,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:51,147 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:48:51,147 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 [2021-11-23 03:48:51,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:51,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:51,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:51,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:51,267 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:48:51,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 54 [2021-11-23 03:48:51,320 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:48:51,320 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 [2021-11-23 03:48:51,374 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:48:53,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11973#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:48:53,031 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:48:53,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:48:53,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 101 [2021-11-23 03:48:53,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121450776] [2021-11-23 03:48:53,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:48:53,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-23 03:48:53,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-23 03:48:53,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1903, Invalid=9869, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 03:48:53,034 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 101 states, 101 states have (on average 2.3168316831683167) internal successors, (234), 101 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:54,020 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2021-11-23 03:48:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 03:48:54,020 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.3168316831683167) internal successors, (234), 101 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-23 03:48:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:54,021 INFO L225 Difference]: With dead ends: 201 [2021-11-23 03:48:54,021 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 03:48:54,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4636 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2975, Invalid=13537, Unknown=0, NotChecked=0, Total=16512 [2021-11-23 03:48:54,022 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 58 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:54,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 2 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:48:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 03:48:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-11-23 03:48:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-11-23 03:48:54,027 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2021-11-23 03:48:54,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:54,027 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-11-23 03:48:54,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.3168316831683167) internal successors, (234), 101 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:48:54,028 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-11-23 03:48:54,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 03:48:54,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:54,029 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 19, 19, 1, 1, 1, 1, 1] [2021-11-23 03:48:54,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 03:48:54,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-23 03:48:54,238 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:48:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash -2023212929, now seen corresponding path program 17 times [2021-11-23 03:48:54,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:54,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368609555] [2021-11-23 03:48:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:54,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 1308 proven. 416 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-23 03:48:55,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:55,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368609555] [2021-11-23 03:48:55,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368609555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:55,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116827135] [2021-11-23 03:48:55,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:48:55,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:55,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:55,252 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:55,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 03:51:51,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-11-23 03:51:51,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:51:51,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-23 03:51:51,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:51,505 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:51:51,505 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 [2021-11-23 03:51:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 1650 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:54,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 1650 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:56,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116827135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:56,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631050332] [2021-11-23 03:51:56,943 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:51:56,943 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:51:56,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:51:56,943 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:51:56,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:51:56,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:56,974 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 [2021-11-23 03:51:56,998 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 20 treesize of output 16 [2021-11-23 03:51:57,030 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 23 treesize of output 19 [2021-11-23 03:51:57,050 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 23 treesize of output 19 [2021-11-23 03:51:57,094 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 [2021-11-23 03:51:57,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:57,159 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:51:57,159 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 [2021-11-23 03:51:57,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:57,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:57,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:57,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:57,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:57,244 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-23 03:51:57,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2021-11-23 03:51:57,327 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:51:57,327 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 [2021-11-23 03:51:57,394 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:51:59,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13352#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:51:59,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:51:59,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:51:59,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 57, 57] total 134 [2021-11-23 03:51:59,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580114219] [2021-11-23 03:51:59,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:51:59,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-11-23 03:51:59,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:59,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-11-23 03:51:59,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4010, Invalid=16012, Unknown=0, NotChecked=0, Total=20022 [2021-11-23 03:51:59,180 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 134 states, 134 states have (on average 2.470149253731343) internal successors, (331), 134 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:02,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:02,073 INFO L93 Difference]: Finished difference Result 334 states and 348 transitions. [2021-11-23 03:52:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-23 03:52:02,073 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.470149253731343) internal successors, (331), 134 states have internal predecessors, (331), 0 states have call successors, (0), 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 143 [2021-11-23 03:52:02,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:02,074 INFO L225 Difference]: With dead ends: 334 [2021-11-23 03:52:02,074 INFO L226 Difference]: Without dead ends: 174 [2021-11-23 03:52:02,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 329 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10950 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=7897, Invalid=30715, Unknown=0, NotChecked=0, Total=38612 [2021-11-23 03:52:02,078 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 89 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:02,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 2 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:52:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-23 03:52:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-23 03:52:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2021-11-23 03:52:02,083 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 143 [2021-11-23 03:52:02,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:02,083 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2021-11-23 03:52:02,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.470149253731343) internal successors, (331), 134 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2021-11-23 03:52:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 03:52:02,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:02,085 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2021-11-23 03:52:02,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-23 03:52:02,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-23 03:52:02,290 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:52:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:02,291 INFO L85 PathProgramCache]: Analyzing trace with hash -558346643, now seen corresponding path program 18 times [2021-11-23 03:52:02,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:02,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605713065] [2021-11-23 03:52:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:02,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2806 backedges. 1024 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:04,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:04,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605713065] [2021-11-23 03:52:04,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605713065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:52:04,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052038307] [2021-11-23 03:52:04,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:52:04,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:04,660 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:52:04,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 03:52:04,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:52:04,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:52:04,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 187 conjunts are in the unsatisfiable core [2021-11-23 03:52:04,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:52:04,843 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:52:04,843 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 13 treesize of output 18 [2021-11-23 03:52:04,853 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 [2021-11-23 03:52:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2806 backedges. 1122 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:13,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:52:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2806 backedges. 1156 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:21,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052038307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:52:21,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801139455] [2021-11-23 03:52:21,282 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:52:21,282 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:52:21,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:52:21,283 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:52:21,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:52:21,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:21,314 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 [2021-11-23 03:52:21,342 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 20 treesize of output 16 [2021-11-23 03:52:21,368 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 23 treesize of output 19 [2021-11-23 03:52:21,391 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 23 treesize of output 19 [2021-11-23 03:52:21,425 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 [2021-11-23 03:52:21,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:21,482 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:52:21,482 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 [2021-11-23 03:52:21,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:21,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:21,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:21,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:21,585 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-23 03:52:21,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2021-11-23 03:52:21,646 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:52:21,647 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 [2021-11-23 03:52:21,704 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:52:24,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15221#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:52:24,665 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:52:24,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:52:24,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 71, 71] total 210 [2021-11-23 03:52:24,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273467261] [2021-11-23 03:52:24,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:52:24,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2021-11-23 03:52:24,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2021-11-23 03:52:24,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4025, Invalid=43717, Unknown=0, NotChecked=0, Total=47742 [2021-11-23 03:52:24,672 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 211 states, 210 states have (on average 2.461904761904762) internal successors, (517), 211 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:29,477 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2021-11-23 03:52:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-23 03:52:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 210 states have (on average 2.461904761904762) internal successors, (517), 211 states have internal predecessors, (517), 0 states have call successors, (0), 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 173 [2021-11-23 03:52:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:29,479 INFO L225 Difference]: With dead ends: 178 [2021-11-23 03:52:29,479 INFO L226 Difference]: Without dead ends: 178 [2021-11-23 03:52:29,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 370 SyntacticMatches, 2 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19276 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=6691, Invalid=58589, Unknown=0, NotChecked=0, Total=65280 [2021-11-23 03:52:29,485 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 3259 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 3600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:29,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 3600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3259 Invalid, 0 Unknown, 337 Unchecked, 1.4s Time] [2021-11-23 03:52:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-23 03:52:29,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-11-23 03:52:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 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) [2021-11-23 03:52:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2021-11-23 03:52:29,493 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 173 [2021-11-23 03:52:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:29,493 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2021-11-23 03:52:29,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 210 states have (on average 2.461904761904762) internal successors, (517), 211 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2021-11-23 03:52:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-23 03:52:29,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:29,495 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1] [2021-11-23 03:52:29,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 03:52:29,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:29,706 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:52:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:29,707 INFO L85 PathProgramCache]: Analyzing trace with hash 703504896, now seen corresponding path program 19 times [2021-11-23 03:52:29,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:29,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655514493] [2021-11-23 03:52:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:29,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 1651 proven. 1256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:32,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:32,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655514493] [2021-11-23 03:52:32,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655514493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:52:32,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197185716] [2021-11-23 03:52:32,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:52:32,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:32,275 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:52:32,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 03:52:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:32,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 147 conjunts are in the unsatisfiable core [2021-11-23 03:52:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:52:32,472 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:52:32,472 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 [2021-11-23 03:52:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 1751 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:37,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:52:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 1717 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:40,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197185716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:52:40,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354542923] [2021-11-23 03:52:40,878 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:52:40,879 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:52:40,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:52:40,879 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:52:40,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:52:40,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:40,914 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 [2021-11-23 03:52:40,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:52:40,993 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 23 treesize of output 19 [2021-11-23 03:52:41,013 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 23 treesize of output 19 [2021-11-23 03:52:41,046 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:52:41,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:41,109 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:52:41,109 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 [2021-11-23 03:52:41,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:41,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:41,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:41,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:41,212 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-23 03:52:41,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2021-11-23 03:52:41,259 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:52:41,259 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 [2021-11-23 03:52:41,310 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:52:43,299 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16891#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#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_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:52:43,299 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:52:43,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:52:43,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74, 74] total 181 [2021-11-23 03:52:43,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324589426] [2021-11-23 03:52:43,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:52:43,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 181 states [2021-11-23 03:52:43,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2021-11-23 03:52:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5991, Invalid=29541, Unknown=0, NotChecked=0, Total=35532 [2021-11-23 03:52:43,306 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 181 states, 181 states have (on average 2.3370165745856353) internal successors, (423), 181 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:46,001 INFO L93 Difference]: Finished difference Result 284 states and 285 transitions. [2021-11-23 03:52:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-23 03:52:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 181 states, 181 states have (on average 2.3370165745856353) internal successors, (423), 181 states have internal predecessors, (423), 0 states have call successors, (0), 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 176 [2021-11-23 03:52:46,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:46,004 INFO L225 Difference]: With dead ends: 284 [2021-11-23 03:52:46,004 INFO L226 Difference]: Without dead ends: 180 [2021-11-23 03:52:46,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13860 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=9359, Invalid=41041, Unknown=0, NotChecked=0, Total=50400 [2021-11-23 03:52:46,008 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 106 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:46,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 2 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:52:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-23 03:52:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-11-23 03:52:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2021-11-23 03:52:46,013 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2021-11-23 03:52:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:46,014 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2021-11-23 03:52:46,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 181 states, 181 states have (on average 2.3370165745856353) internal successors, (423), 181 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2021-11-23 03:52:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 03:52:46,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:46,016 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2021-11-23 03:52:46,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 03:52:46,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:46,232 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 03:52:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash 404104078, now seen corresponding path program 20 times [2021-11-23 03:52:46,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:46,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999447756] [2021-11-23 03:52:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:46,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2976 backedges. 1089 proven. 1887 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:48,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:48,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999447756] [2021-11-23 03:52:48,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999447756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:52:48,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954164582] [2021-11-23 03:52:48,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:52:48,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:48,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:48,752 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:52:48,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39826767-6f50-4352-9dc6-6c4d7e048b09/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process