./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrcpy_mixed_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcpy_mixed_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur --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 64bit --witnessprinter.graph.data.programhash 042bf93dbb8c5bbe3967b75ad3452e25eaf29960f1f46ba7421ec842aefc346e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:36:55,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:36:55,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:36:55,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:36:55,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:36:55,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:36:55,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:36:55,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:36:55,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:36:55,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:36:55,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:36:55,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:36:55,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:36:55,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:36:55,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:36:55,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:36:55,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:36:55,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:36:55,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:36:55,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:36:55,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:36:55,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:36:55,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:36:55,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:36:55,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:36:55,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:36:55,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:36:55,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:36:55,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:36:55,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:36:55,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:36:55,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:36:55,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:36:55,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:36:55,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:36:55,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:36:55,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:36:55,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:36:55,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:36:55,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:36:55,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:36:55,832 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-26 00:36:55,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:36:55,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:36:55,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:36:55,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:36:55,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:36:55,881 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:36:55,881 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:36:55,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:36:55,882 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:36:55,882 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:36:55,884 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:36:55,884 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:36:55,884 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:36:55,884 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:36:55,885 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:36:55,885 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:36:55,885 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:36:55,885 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:36:55,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:36:55,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:36:55,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:36:55,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:36:55,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:36:55,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:36:55,888 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:36:55,888 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:36:55,889 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:36:55,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:36:55,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:36:55,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:36:55,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:36:55,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:36:55,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:36:55,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:36:55,891 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:36:55,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:36:55,891 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:36:55,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:36:55,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:36:55,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 042bf93dbb8c5bbe3967b75ad3452e25eaf29960f1f46ba7421ec842aefc346e [2022-11-26 00:36:56,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:36:56,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:36:56,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:36:56,274 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:36:56,274 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:36:56,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/termination-15/cstrcpy_mixed_alloca.i [2022-11-26 00:36:59,433 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:36:59,714 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:36:59,715 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/sv-benchmarks/c/termination-15/cstrcpy_mixed_alloca.i [2022-11-26 00:36:59,729 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/data/1afea4df9/ede0f954c1a54c2da876d0eddc78eeb0/FLAG8befc37e2 [2022-11-26 00:36:59,748 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/data/1afea4df9/ede0f954c1a54c2da876d0eddc78eeb0 [2022-11-26 00:36:59,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:36:59,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:36:59,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:36:59,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:36:59,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:36:59,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:36:59" (1/1) ... [2022-11-26 00:36:59,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748fb2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:36:59, skipping insertion in model container [2022-11-26 00:36:59,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:36:59" (1/1) ... [2022-11-26 00:36:59,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:36:59,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:37:00,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:37:00,185 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:37:00,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:37:00,316 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:37:00,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00 WrapperNode [2022-11-26 00:37:00,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:37:00,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:37:00,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:37:00,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:37:00,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,373 INFO L138 Inliner]: procedures = 152, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-11-26 00:37:00,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:37:00,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:37:00,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:37:00,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:37:00,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,413 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:37:00,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:37:00,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:37:00,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:37:00,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (1/1) ... [2022-11-26 00:37:00,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:37:00,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:00,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:37:00,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:37:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:37:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:37:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:37:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:37:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:37:00,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:37:00,649 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:37:00,652 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:37:00,901 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:37:01,009 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:37:01,009 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:37:01,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:37:01 BoogieIcfgContainer [2022-11-26 00:37:01,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:37:01,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:37:01,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:37:01,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:37:01,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:36:59" (1/3) ... [2022-11-26 00:37:01,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a4dd51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:37:01, skipping insertion in model container [2022-11-26 00:37:01,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:00" (2/3) ... [2022-11-26 00:37:01,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a4dd51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:37:01, skipping insertion in model container [2022-11-26 00:37:01,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:37:01" (3/3) ... [2022-11-26 00:37:01,035 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcpy_mixed_alloca.i [2022-11-26 00:37:01,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:37:01,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-11-26 00:37:01,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:37:01,111 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1dfbab70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:37:01,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-26 00:37:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 2.111111111111111) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:37:01,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:01,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:37:01,123 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash 85142, now seen corresponding path program 1 times [2022-11-26 00:37:01,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:01,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371405535] [2022-11-26 00:37:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:01,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:01,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371405535] [2022-11-26 00:37:01,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371405535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:37:01,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:37:01,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:37:01,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822181996] [2022-11-26 00:37:01,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:37:01,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:37:01,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:01,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:37:01,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:37:01,383 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 2.111111111111111) internal successors, (19), 16 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:01,466 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-26 00:37:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:37:01,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:37:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:01,478 INFO L225 Difference]: With dead ends: 18 [2022-11-26 00:37:01,478 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 00:37:01,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:37:01,484 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:01,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:37:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 00:37:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-26 00:37:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-11-26 00:37:01,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2022-11-26 00:37:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:01,520 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-11-26 00:37:01,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-11-26 00:37:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:37:01,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:01,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:37:01,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:37:01,525 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash 85178, now seen corresponding path program 1 times [2022-11-26 00:37:01,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:01,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133574682] [2022-11-26 00:37:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:01,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:01,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:01,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133574682] [2022-11-26 00:37:01,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133574682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:37:01,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:37:01,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:37:01,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613578778] [2022-11-26 00:37:01,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:37:01,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:37:01,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:01,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:37:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:37:01,784 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:01,824 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-26 00:37:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:37:01,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:37:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:01,825 INFO L225 Difference]: With dead ends: 15 [2022-11-26 00:37:01,826 INFO L226 Difference]: Without dead ends: 15 [2022-11-26 00:37:01,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:37:01,827 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:01,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:37:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-26 00:37:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-26 00:37:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-26 00:37:01,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 3 [2022-11-26 00:37:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:01,832 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-26 00:37:01,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-26 00:37:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:37:01,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:01,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:37:01,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:37:01,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:01,834 INFO L85 PathProgramCache]: Analyzing trace with hash 85179, now seen corresponding path program 1 times [2022-11-26 00:37:01,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:01,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155052651] [2022-11-26 00:37:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:01,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:02,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:02,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155052651] [2022-11-26 00:37:02,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155052651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:37:02,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:37:02,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:37:02,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608604095] [2022-11-26 00:37:02,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:37:02,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:37:02,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:02,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:37:02,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:37:02,296 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:02,323 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-26 00:37:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:37:02,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:37:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:02,325 INFO L225 Difference]: With dead ends: 14 [2022-11-26 00:37:02,325 INFO L226 Difference]: Without dead ends: 14 [2022-11-26 00:37:02,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:37:02,327 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:02,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:37:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-26 00:37:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-26 00:37:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-26 00:37:02,332 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 3 [2022-11-26 00:37:02,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:02,332 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-26 00:37:02,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-26 00:37:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:37:02,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:02,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:37:02,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:37:02,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash 81884825, now seen corresponding path program 1 times [2022-11-26 00:37:02,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:02,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693662112] [2022-11-26 00:37:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:02,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:02,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693662112] [2022-11-26 00:37:02,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693662112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:37:02,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:37:02,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:37:02,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691015116] [2022-11-26 00:37:02,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:37:02,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:37:02,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:37:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:37:02,432 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:02,502 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2022-11-26 00:37:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:37:02,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:37:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:02,504 INFO L225 Difference]: With dead ends: 13 [2022-11-26 00:37:02,504 INFO L226 Difference]: Without dead ends: 13 [2022-11-26 00:37:02,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:37:02,506 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:02,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 5 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:37:02,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-26 00:37:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-26 00:37:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-11-26 00:37:02,509 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 5 [2022-11-26 00:37:02,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:02,510 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-11-26 00:37:02,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-11-26 00:37:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:37:02,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:02,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:37:02,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:37:02,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash 81884826, now seen corresponding path program 1 times [2022-11-26 00:37:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:02,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061937009] [2022-11-26 00:37:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:02,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:02,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061937009] [2022-11-26 00:37:02,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061937009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:37:02,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:37:02,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:37:02,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086187687] [2022-11-26 00:37:02,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:37:02,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:37:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:37:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:37:02,732 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:02,827 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-26 00:37:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:37:02,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:37:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:02,829 INFO L225 Difference]: With dead ends: 19 [2022-11-26 00:37:02,829 INFO L226 Difference]: Without dead ends: 19 [2022-11-26 00:37:02,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:37:02,830 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:02,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:37:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-26 00:37:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-26 00:37:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-26 00:37:02,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2022-11-26 00:37:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:02,835 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-26 00:37:02,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-26 00:37:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:37:02,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:02,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:37:02,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:37:02,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:02,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1756537719, now seen corresponding path program 1 times [2022-11-26 00:37:02,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:02,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467254716] [2022-11-26 00:37:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:02,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:03,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:03,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467254716] [2022-11-26 00:37:03,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467254716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:37:03,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:37:03,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:37:03,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765069206] [2022-11-26 00:37:03,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:37:03,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:37:03,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:03,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:37:03,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:37:03,073 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:03,140 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-26 00:37:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:37:03,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:37:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:03,143 INFO L225 Difference]: With dead ends: 14 [2022-11-26 00:37:03,143 INFO L226 Difference]: Without dead ends: 14 [2022-11-26 00:37:03,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:37:03,146 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:03,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 5 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:37:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-26 00:37:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-26 00:37:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-26 00:37:03,151 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 6 [2022-11-26 00:37:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:03,151 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-26 00:37:03,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-26 00:37:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:37:03,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:03,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:37:03,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:37:03,153 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:03,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:03,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1756537718, now seen corresponding path program 1 times [2022-11-26 00:37:03,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:03,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722026412] [2022-11-26 00:37:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:03,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:03,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:03,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722026412] [2022-11-26 00:37:03,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722026412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:37:03,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:37:03,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:37:03,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087916761] [2022-11-26 00:37:03,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:37:03,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:37:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:37:03,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:37:03,608 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:03,715 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-26 00:37:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:37:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:37:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:03,716 INFO L225 Difference]: With dead ends: 15 [2022-11-26 00:37:03,716 INFO L226 Difference]: Without dead ends: 15 [2022-11-26 00:37:03,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:37:03,718 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:03,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:37:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-26 00:37:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-26 00:37:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-26 00:37:03,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 6 [2022-11-26 00:37:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:03,721 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-26 00:37:03,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-26 00:37:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:37:03,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:03,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:37:03,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:37:03,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash 866355129, now seen corresponding path program 1 times [2022-11-26 00:37:03,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:03,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918936940] [2022-11-26 00:37:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:03,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:03,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:03,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918936940] [2022-11-26 00:37:03,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918936940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:37:03,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:37:03,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:37:03,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132168124] [2022-11-26 00:37:03,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:37:03,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:37:03,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:03,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:37:03,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:37:03,936 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:03,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:03,957 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-26 00:37:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:37:03,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:37:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:03,959 INFO L225 Difference]: With dead ends: 14 [2022-11-26 00:37:03,959 INFO L226 Difference]: Without dead ends: 12 [2022-11-26 00:37:03,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:37:03,965 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:03,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:37:03,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-26 00:37:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-26 00:37:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-26 00:37:03,971 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2022-11-26 00:37:03,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:03,971 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-26 00:37:03,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-26 00:37:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:37:03,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:03,979 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:37:03,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:37:03,979 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash 866356322, now seen corresponding path program 1 times [2022-11-26 00:37:03,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:03,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772698030] [2022-11-26 00:37:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:03,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:04,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:04,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772698030] [2022-11-26 00:37:04,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772698030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:37:04,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271923976] [2022-11-26 00:37:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:04,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:04,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:04,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:04,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:37:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:04,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:37:04,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:04,603 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:37:04,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:37:04,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:37:04,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:37:04,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2022-11-26 00:37:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:04,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:05,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-26 00:37:05,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-26 00:37:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:05,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271923976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:05,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49126652] [2022-11-26 00:37:05,287 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 00:37:05,287 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:37:05,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:37:05,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:37:05,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:37:05,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:05,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:37:05,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:37:05,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:37:05,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:05,622 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:37:05,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:37:05,844 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:37:05,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:37:05,972 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:37:05,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:37:05,995 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:37:07,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '374#(and (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (= |ULTIMATE.start_main_#t~malloc210#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (<= |ULTIMATE.start_cstrcpy_#t~post205#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (= (+ |ULTIMATE.start_cstrcpy_~dst~0#1.offset| 1) |ULTIMATE.start_cstrcpy_#t~post205#1.offset|) (= |ULTIMATE.start_cstrcpy_~dst~0#1.base| |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (= |ULTIMATE.start_cstrcpy_#t~post206#1.base| |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc211#1.offset| 0) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post206#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_cstrcpy_~src~0#1.offset| (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc210#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc211#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 2147483646) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:37:07,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:37:07,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:37:07,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-26 00:37:07,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807377298] [2022-11-26 00:37:07,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:37:07,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:37:07,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:07,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:37:07,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:37:07,310 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:07,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:07,761 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-11-26 00:37:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:37:07,762 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 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 9 [2022-11-26 00:37:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:07,763 INFO L225 Difference]: With dead ends: 18 [2022-11-26 00:37:07,763 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 00:37:07,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:37:07,765 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:07,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 4 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:37:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 00:37:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2022-11-26 00:37:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-26 00:37:07,768 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2022-11-26 00:37:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:07,768 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-26 00:37:07,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-26 00:37:07,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:37:07,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:07,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:37:07,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:37:07,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:07,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:07,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:07,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1087242178, now seen corresponding path program 1 times [2022-11-26 00:37:07,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:07,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867349446] [2022-11-26 00:37:07,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:07,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:08,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:08,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867349446] [2022-11-26 00:37:08,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867349446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:37:08,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937612366] [2022-11-26 00:37:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:08,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:08,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:08,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:08,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:37:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:08,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-26 00:37:08,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:08,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:37:08,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:37:08,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-11-26 00:37:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:08,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:09,092 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:37:09,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-26 00:37:09,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-26 00:37:09,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-26 00:37:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:09,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937612366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:09,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688958082] [2022-11-26 00:37:09,317 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 00:37:09,317 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:37:09,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:37:09,318 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:37:09,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:37:09,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:09,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:37:09,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:37:09,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:37:09,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:09,516 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:37:09,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:37:09,641 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:37:09,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:37:09,762 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:37:09,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:37:09,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:37:11,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '505#(and (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (= |ULTIMATE.start_main_#t~malloc210#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.offset|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post206#1.base|)) (<= 0 |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (<= |ULTIMATE.start_cstrcpy_#t~post205#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (= (+ |ULTIMATE.start_cstrcpy_~dst~0#1.offset| 1) |ULTIMATE.start_cstrcpy_#t~post205#1.offset|) (= |ULTIMATE.start_cstrcpy_~dst~0#1.base| |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (= |ULTIMATE.start_cstrcpy_#t~post206#1.base| |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc211#1.offset| 0) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (or (not (<= (+ |ULTIMATE.start_cstrcpy_#t~post205#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post205#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcpy_#t~post205#1.offset|))) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post206#1.base|) 1) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_cstrcpy_~src~0#1.offset| (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc210#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post206#1.base|) |ULTIMATE.start_cstrcpy_#t~post206#1.offset|) |ULTIMATE.start_cstrcpy_#t~mem207#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc211#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 2147483646) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:37:11,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:37:11,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:37:11,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-26 00:37:11,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222652267] [2022-11-26 00:37:11,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:37:11,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:37:11,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:11,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:37:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:37:11,144 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:11,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:11,965 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-26 00:37:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:37:11,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:37:11,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:11,966 INFO L225 Difference]: With dead ends: 17 [2022-11-26 00:37:11,966 INFO L226 Difference]: Without dead ends: 17 [2022-11-26 00:37:11,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:37:11,968 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:11,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 11 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:37:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-26 00:37:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-11-26 00:37:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-11-26 00:37:11,970 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10 [2022-11-26 00:37:11,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:11,971 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-11-26 00:37:11,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-11-26 00:37:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:37:11,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:11,972 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2022-11-26 00:37:11,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:37:12,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:12,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:12,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1683324458, now seen corresponding path program 2 times [2022-11-26 00:37:12,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:12,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786132396] [2022-11-26 00:37:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:12,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:13,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:13,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786132396] [2022-11-26 00:37:13,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786132396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:37:13,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057724100] [2022-11-26 00:37:13,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:37:13,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:13,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:13,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:13,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:37:13,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:37:13,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:37:13,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-26 00:37:13,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:13,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:37:13,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 00:37:13,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:37:13,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-26 00:37:14,144 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-26 00:37:14,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2022-11-26 00:37:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:14,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:14,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:37:14,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-26 00:37:14,922 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-26 00:37:14,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-26 00:37:14,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:37:14,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:37:14,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2022-11-26 00:37:14,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:37:15,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:37:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:15,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057724100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:15,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688996123] [2022-11-26 00:37:15,076 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 00:37:15,076 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:37:15,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:37:15,077 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:37:15,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:37:15,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:15,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:37:15,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:37:15,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:37:15,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:15,286 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:37:15,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:37:15,417 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:37:15,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:37:15,507 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:37:15,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:37:15,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:37:16,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '666#(and (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (= |ULTIMATE.start_main_#t~malloc210#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (<= |ULTIMATE.start_cstrcpy_#t~post205#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (= (+ |ULTIMATE.start_cstrcpy_~dst~0#1.offset| 1) |ULTIMATE.start_cstrcpy_#t~post205#1.offset|) (= |ULTIMATE.start_cstrcpy_~dst~0#1.base| |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (= |ULTIMATE.start_cstrcpy_#t~post206#1.base| |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc211#1.offset| 0) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post206#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_cstrcpy_~src~0#1.offset| (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc210#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc211#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 2147483646) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:37:16,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:37:16,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:37:16,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-11-26 00:37:16,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704252145] [2022-11-26 00:37:16,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:37:16,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:37:16,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:16,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:37:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1263, Unknown=5, NotChecked=0, Total=1406 [2022-11-26 00:37:16,887 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:19,158 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-11-26 00:37:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:37:19,158 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:37:19,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:19,159 INFO L225 Difference]: With dead ends: 22 [2022-11-26 00:37:19,159 INFO L226 Difference]: Without dead ends: 22 [2022-11-26 00:37:19,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=297, Invalid=2050, Unknown=5, NotChecked=0, Total=2352 [2022-11-26 00:37:19,161 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:19,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 7 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 233 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:37:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-26 00:37:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-11-26 00:37:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-11-26 00:37:19,164 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 13 [2022-11-26 00:37:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:19,164 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-11-26 00:37:19,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-11-26 00:37:19,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:37:19,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:19,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2022-11-26 00:37:19,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 00:37:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:37:19,367 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:19,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash 643450618, now seen corresponding path program 2 times [2022-11-26 00:37:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:19,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445714595] [2022-11-26 00:37:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:19,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:19,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445714595] [2022-11-26 00:37:19,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445714595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:37:19,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094968899] [2022-11-26 00:37:19,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:37:19,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:19,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:19,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:19,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:37:20,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:37:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:37:20,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-26 00:37:20,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:20,273 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:37:20,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:37:20,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:37:20,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:37:20,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-26 00:37:20,752 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-26 00:37:20,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-26 00:37:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:20,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:23,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:37:23,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-26 00:37:23,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-26 00:37:23,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:37:23,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-26 00:37:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:23,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094968899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:23,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1284814657] [2022-11-26 00:37:23,857 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 00:37:23,857 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:37:23,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:37:23,858 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:37:23,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:37:23,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:23,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:37:23,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:37:24,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:37:24,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:24,051 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:37:24,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:37:24,182 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:37:24,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:37:24,271 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:37:24,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:37:24,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:37:25,869 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '848#(and (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (= |ULTIMATE.start_main_#t~malloc210#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.offset|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post206#1.base|)) (<= 0 |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (<= |ULTIMATE.start_cstrcpy_#t~post205#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (= (+ |ULTIMATE.start_cstrcpy_~dst~0#1.offset| 1) |ULTIMATE.start_cstrcpy_#t~post205#1.offset|) (= |ULTIMATE.start_cstrcpy_~dst~0#1.base| |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (= |ULTIMATE.start_cstrcpy_#t~post206#1.base| |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc211#1.offset| 0) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (or (not (<= (+ |ULTIMATE.start_cstrcpy_#t~post205#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post205#1.base|))) (not (<= 0 |ULTIMATE.start_cstrcpy_#t~post205#1.offset|))) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post206#1.base|) 1) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_cstrcpy_~src~0#1.offset| (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc210#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post206#1.base|) |ULTIMATE.start_cstrcpy_#t~post206#1.offset|) |ULTIMATE.start_cstrcpy_#t~mem207#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc211#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 2147483646) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:37:25,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:37:25,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:37:25,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 33 [2022-11-26 00:37:25,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279158131] [2022-11-26 00:37:25,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:37:25,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:37:25,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:25,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:37:25,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1506, Unknown=1, NotChecked=0, Total=1640 [2022-11-26 00:37:25,872 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:29,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:29,077 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-11-26 00:37:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:37:29,078 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:37:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:29,078 INFO L225 Difference]: With dead ends: 23 [2022-11-26 00:37:29,079 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:37:29,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=379, Invalid=2926, Unknown=1, NotChecked=0, Total=3306 [2022-11-26 00:37:29,080 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:29,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 292 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:37:29,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:37:29,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-11-26 00:37:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-11-26 00:37:29,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2022-11-26 00:37:29,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:29,094 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-11-26 00:37:29,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-11-26 00:37:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:37:29,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:29,096 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1] [2022-11-26 00:37:29,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-26 00:37:29,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:37:29,301 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash 598297586, now seen corresponding path program 3 times [2022-11-26 00:37:29,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:29,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782675799] [2022-11-26 00:37:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:29,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:30,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:30,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782675799] [2022-11-26 00:37:30,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782675799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:37:30,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528057088] [2022-11-26 00:37:30,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:37:30,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:30,350 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:30,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:37:30,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:37:30,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:37:30,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-26 00:37:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:30,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:37:30,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 00:37:30,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:37:30,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-26 00:37:31,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-26 00:37:31,709 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-11-26 00:37:31,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2022-11-26 00:37:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:31,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:35,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:37:35,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 48 [2022-11-26 00:37:35,454 INFO L321 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-11-26 00:37:35,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 39 [2022-11-26 00:37:35,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:37:35,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 70 [2022-11-26 00:37:35,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:37:35,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:37:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:35,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528057088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500665597] [2022-11-26 00:37:35,765 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 00:37:35,766 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:37:35,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:37:35,766 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:37:35,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:37:35,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:35,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:37:35,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:37:35,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:37:35,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:35,947 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:37:35,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:37:36,107 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:37:36,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:37:36,209 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:37:36,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:37:36,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:37:37,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1069#(and (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (= |ULTIMATE.start_main_#t~malloc210#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (<= |ULTIMATE.start_cstrcpy_#t~post205#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (= (+ |ULTIMATE.start_cstrcpy_~dst~0#1.offset| 1) |ULTIMATE.start_cstrcpy_#t~post205#1.offset|) (= |ULTIMATE.start_cstrcpy_~dst~0#1.base| |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (= |ULTIMATE.start_cstrcpy_#t~post206#1.base| |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc211#1.offset| 0) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post206#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_cstrcpy_~src~0#1.offset| (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc210#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc211#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 2147483646) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:37:37,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:37:37,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:37:37,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 42 [2022-11-26 00:37:37,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100111190] [2022-11-26 00:37:37,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:37:37,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-26 00:37:37,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-26 00:37:37,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2250, Unknown=7, NotChecked=0, Total=2450 [2022-11-26 00:37:37,977 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:49,161 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-11-26 00:37:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:37:49,162 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-26 00:37:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:49,162 INFO L225 Difference]: With dead ends: 32 [2022-11-26 00:37:49,162 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:37:49,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=536, Invalid=4424, Unknown=10, NotChecked=0, Total=4970 [2022-11-26 00:37:49,165 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 153 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 31 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:49,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 0 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 359 Invalid, 10 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:37:49,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:37:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-11-26 00:37:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-11-26 00:37:49,168 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 17 [2022-11-26 00:37:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:49,168 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-11-26 00:37:49,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-11-26 00:37:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 00:37:49,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:49,169 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1] [2022-11-26 00:37:49,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:37:49,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:37:49,376 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:37:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1365499210, now seen corresponding path program 4 times [2022-11-26 00:37:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:49,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097250875] [2022-11-26 00:37:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:49,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:51,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:51,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097250875] [2022-11-26 00:37:51,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097250875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:37:51,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955237523] [2022-11-26 00:37:51,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:37:51,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:51,338 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:51,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:37:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-26 00:37:51,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:51,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:37:51,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 00:37:51,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:37:51,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-26 00:37:52,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-26 00:37:52,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-26 00:37:53,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2022-11-26 00:37:54,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2022-11-26 00:37:55,277 INFO L321 Elim1Store]: treesize reduction 20, result has 69.7 percent of original size [2022-11-26 00:37:55,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 72 [2022-11-26 00:37:55,303 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-26 00:37:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:55,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:03,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:38:03,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 84 [2022-11-26 00:38:03,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 126 [2022-11-26 00:38:03,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 145 [2022-11-26 00:38:03,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:38:03,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:38:03,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:38:03,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:38:03,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:38:03,517 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-26 00:38:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:03,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955237523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:03,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [53596502] [2022-11-26 00:38:03,762 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 00:38:03,762 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:03,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:38:03,763 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:38:03,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:38:03,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:03,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:38:03,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-26 00:38:03,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:38:03,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:03,946 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:38:03,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:38:04,062 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:38:04,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:38:04,153 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:38:04,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:38:04,174 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:38:06,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1424#(and (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (= |ULTIMATE.start_main_#t~malloc210#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (<= |ULTIMATE.start_cstrcpy_#t~post205#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (= (+ |ULTIMATE.start_cstrcpy_~dst~0#1.offset| 1) |ULTIMATE.start_cstrcpy_#t~post205#1.offset|) (= |ULTIMATE.start_cstrcpy_~dst~0#1.base| |ULTIMATE.start_cstrcpy_#t~post205#1.base|) (= |ULTIMATE.start_cstrcpy_#t~post206#1.base| |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc211#1.offset| 0) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 2147483646) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post206#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_cstrcpy_~src~0#1.offset| (+ |ULTIMATE.start_cstrcpy_#t~post206#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc210#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc211#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post206#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 2147483646) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:38:06,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:38:06,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:38:06,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 27] total 75 [2022-11-26 00:38:06,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285036738] [2022-11-26 00:38:06,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-26 00:38:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-26 00:38:06,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=6340, Unknown=71, NotChecked=0, Total=6806 [2022-11-26 00:38:06,634 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 76 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:55,457 WARN L233 SmtUtils]: Spent 39.98s on a formula simplification. DAG size of input: 185 DAG size of output: 166 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:39:34,375 WARN L233 SmtUtils]: Spent 37.17s on a formula simplification. DAG size of input: 229 DAG size of output: 167 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:39:57,304 WARN L233 SmtUtils]: Spent 21.69s on a formula simplification. DAG size of input: 188 DAG size of output: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:40:54,208 WARN L233 SmtUtils]: Spent 46.42s on a formula simplification. DAG size of input: 172 DAG size of output: 152 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:40:56,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 00:40:58,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 00:41:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:08,135 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-11-26 00:41:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-26 00:41:08,139 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-26 00:41:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:08,140 INFO L225 Difference]: With dead ends: 52 [2022-11-26 00:41:08,140 INFO L226 Difference]: Without dead ends: 52 [2022-11-26 00:41:08,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 185.7s TimeCoverageRelationStatistics Valid=1210, Invalid=13428, Unknown=124, NotChecked=0, Total=14762 [2022-11-26 00:41:08,145 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 209 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 83 mSolverCounterUnsat, 51 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 51 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:08,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 0 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1347 Invalid, 51 Unknown, 0 Unchecked, 9.0s Time] [2022-11-26 00:41:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-26 00:41:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-11-26 00:41:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-11-26 00:41:08,150 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 29 [2022-11-26 00:41:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:08,150 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-11-26 00:41:08,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-11-26 00:41:08,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 00:41:08,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:08,152 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1] [2022-11-26 00:41:08,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:08,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:08,359 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-26 00:41:08,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1182444082, now seen corresponding path program 5 times [2022-11-26 00:41:08,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:08,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266915423] [2022-11-26 00:41:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:08,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:13,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:13,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266915423] [2022-11-26 00:41:13,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266915423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:13,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367289637] [2022-11-26 00:41:13,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:41:13,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:13,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:13,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38f73fe6-ca2b-4921-9f54-f72b5d707523/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:41:13,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-26 00:41:13,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:41:13,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 205 conjunts are in the unsatisfiable core [2022-11-26 00:41:13,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:13,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:41:13,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:41:14,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-26 00:41:14,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-26 00:41:15,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2022-11-26 00:41:16,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-11-26 00:41:19,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-11-26 00:41:23,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 53 [2022-11-26 00:41:31,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-11-26 00:42:05,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2022-11-26 00:43:44,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-11-26 00:46:39,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 77 [2022-11-26 00:48:24,520 INFO L217 Elim1Store]: Index analysis took 109 ms [2022-11-26 00:48:27,395 INFO L321 Elim1Store]: treesize reduction 40, result has 92.9 percent of original size [2022-11-26 00:48:27,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 99 treesize of output 571 [2022-11-26 00:48:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 221 refuted. 21 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:48,852 INFO L328 TraceCheckSpWp]: Computing backward predicates...