./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 --- 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-5e519f3 [2022-11-03 04:05:41,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:05:41,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:05:41,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:05:41,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:05:41,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:05:41,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:05:41,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:05:41,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:05:41,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:05:41,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:05:41,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:05:41,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:05:41,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:05:41,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:05:41,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:05:41,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:05:41,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:05:41,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:05:41,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:05:41,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:05:41,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:05:41,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:05:41,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:05:41,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:05:41,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:05:41,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:05:41,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:05:41,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:05:41,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:05:41,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:05:41,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:05:41,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:05:41,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:05:41,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:05:41,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:05:41,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:05:41,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:05:41,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:05:41,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:05:41,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:05:41,624 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 04:05:41,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:05:41,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:05:41,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:05:41,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:05:41,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:05:41,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:05:41,675 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:05:41,675 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:05:41,675 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:05:41,676 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:05:41,677 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:05:41,677 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:05:41,678 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:05:41,678 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:05:41,678 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:05:41,678 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:05:41,679 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:05:41,679 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:05:41,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 04:05:41,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 04:05:41,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:05:41,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:05:41,681 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 04:05:41,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:05:41,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:05:41,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:05:41,682 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 04:05:41,682 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 04:05:41,683 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 04:05:41,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:05:41,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:05:41,684 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:05:41,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:05:41,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:05:41,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:05:41,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:05:41,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:05:41,685 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:05:41,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:05:41,688 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:05:41,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:05:41,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:05:41,689 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_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 [2022-11-03 04:05:42,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:05:42,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:05:42,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:05:42,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:05:42,103 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:05:42,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2022-11-03 04:05:42,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/data/12de8fc5f/540438c56c8f433c946d71ecc87286ea/FLAG801dd79fa [2022-11-03 04:05:43,030 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:05:43,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2022-11-03 04:05:43,045 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/data/12de8fc5f/540438c56c8f433c946d71ecc87286ea/FLAG801dd79fa [2022-11-03 04:05:43,250 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/data/12de8fc5f/540438c56c8f433c946d71ecc87286ea [2022-11-03 04:05:43,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:05:43,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:05:43,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:05:43,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:05:43,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:05:43,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ce81c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43, skipping insertion in model container [2022-11-03 04:05:43,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:05:43,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:05:43,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:05:43,700 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:05:43,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:05:43,772 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:05:43,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43 WrapperNode [2022-11-03 04:05:43,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:05:43,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:05:43,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:05:43,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:05:43,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,826 INFO L138 Inliner]: procedures = 117, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2022-11-03 04:05:43,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:05:43,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:05:43,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:05:43,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:05:43,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,882 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:05:43,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:05:43,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:05:43,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:05:43,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (1/1) ... [2022-11-03 04:05:43,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:05:43,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:43,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:05:43,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:05:44,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 04:05:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 04:05:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 04:05:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 04:05:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:05:44,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:05:44,183 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:05:44,185 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:05:44,437 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:05:44,551 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:05:44,560 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 04:05:44,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:05:44 BoogieIcfgContainer [2022-11-03 04:05:44,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:05:44,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:05:44,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:05:44,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:05:44,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:05:43" (1/3) ... [2022-11-03 04:05:44,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1694bb5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:05:44, skipping insertion in model container [2022-11-03 04:05:44,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:05:43" (2/3) ... [2022-11-03 04:05:44,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1694bb5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:05:44, skipping insertion in model container [2022-11-03 04:05:44,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:05:44" (3/3) ... [2022-11-03 04:05:44,580 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncpy-alloca-2.i [2022-11-03 04:05:44,604 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:05:44,605 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-11-03 04:05:44,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:05:44,696 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;@10a07603, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:05:44,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-03 04:05:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 2.230769230769231) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 04:05:44,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:44,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 04:05:44,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash 122785, now seen corresponding path program 1 times [2022-11-03 04:05:44,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:44,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552716187] [2022-11-03 04:05:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:44,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:45,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:45,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552716187] [2022-11-03 04:05:45,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552716187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:45,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:45,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 04:05:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809205277] [2022-11-03 04:05:45,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:45,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:05:45,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:05:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:05:45,336 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 2.230769230769231) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 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) [2022-11-03 04:05:45,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:45,476 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-11-03 04:05:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:05:45,485 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 [2022-11-03 04:05:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:45,495 INFO L225 Difference]: With dead ends: 23 [2022-11-03 04:05:45,495 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 04:05:45,497 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 [2022-11-03 04:05:45,502 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:45,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 11 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:45,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 04:05:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-03 04:05:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 21 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) [2022-11-03 04:05:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-03 04:05:45,557 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 3 [2022-11-03 04:05:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:45,558 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-03 04:05:45,558 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) [2022-11-03 04:05:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-03 04:05:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 04:05:45,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:45,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 04:05:45,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:05:45,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:45,565 INFO L85 PathProgramCache]: Analyzing trace with hash 122786, now seen corresponding path program 1 times [2022-11-03 04:05:45,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:45,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748117459] [2022-11-03 04:05:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:45,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:45,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748117459] [2022-11-03 04:05:45,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748117459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:45,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:45,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:05:45,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607321756] [2022-11-03 04:05:45,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:45,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:45,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:45,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:45,962 INFO L87 Difference]: Start difference. First operand 22 states and 25 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) [2022-11-03 04:05:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:46,082 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-11-03 04:05:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:05:46,083 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 [2022-11-03 04:05:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:46,084 INFO L225 Difference]: With dead ends: 42 [2022-11-03 04:05:46,084 INFO L226 Difference]: Without dead ends: 42 [2022-11-03 04:05:46,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:05:46,086 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:46,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-03 04:05:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2022-11-03 04:05:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8666666666666667) 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) [2022-11-03 04:05:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-03 04:05:46,099 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 3 [2022-11-03 04:05:46,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:46,099 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-03 04:05:46,100 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) [2022-11-03 04:05:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-03 04:05:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 04:05:46,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:46,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 04:05:46,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:05:46,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:46,102 INFO L85 PathProgramCache]: Analyzing trace with hash 124903, now seen corresponding path program 1 times [2022-11-03 04:05:46,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:46,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049444698] [2022-11-03 04:05:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:46,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:46,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:46,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049444698] [2022-11-03 04:05:46,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049444698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:46,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:46,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:05:46,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26218176] [2022-11-03 04:05:46,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:46,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:46,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:46,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:46,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:46,418 INFO L87 Difference]: Start difference. First operand 24 states and 28 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) [2022-11-03 04:05:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:46,451 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-03 04:05:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:05:46,452 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 [2022-11-03 04:05:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:46,453 INFO L225 Difference]: With dead ends: 23 [2022-11-03 04:05:46,453 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 04:05:46,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:46,454 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 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 [2022-11-03 04:05:46,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:05:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 04:05:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-03 04:05:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-03 04:05:46,479 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 3 [2022-11-03 04:05:46,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:46,480 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-03 04:05:46,480 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) [2022-11-03 04:05:46,480 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-03 04:05:46,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:05:46,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:46,481 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-03 04:05:46,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:05:46,481 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash 118058628, now seen corresponding path program 1 times [2022-11-03 04:05:46,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:46,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531274671] [2022-11-03 04:05:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:46,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:46,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:46,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531274671] [2022-11-03 04:05:46,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531274671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:05:46,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710701798] [2022-11-03 04:05:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:46,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:46,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:46,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:46,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:05:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:05:46,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:47,030 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-03 04:05:47,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-03 04:05:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:47,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:47,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710701798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:47,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546758633] [2022-11-03 04:05:47,514 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-03 04:05:47,514 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:05:47,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:05:47,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:05:47,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:05:47,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:47,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:05:47,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:05:47,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:05:47,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:05:48,000 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:05:48,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '233#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_#t~nondet13#1| 127) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet13#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset| 1) (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:05:48,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:05:48,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:05:48,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-03 04:05:48,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291452193] [2022-11-03 04:05:48,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:48,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 04:05:48,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 04:05:48,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:05:48,381 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:48,693 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-11-03 04:05:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:48,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 04:05:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:48,695 INFO L225 Difference]: With dead ends: 57 [2022-11-03 04:05:48,695 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 04:05:48,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:05:48,697 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 143 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:48,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 90 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:05:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 04:05:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 20. [2022-11-03 04:05:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-03 04:05:48,701 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 5 [2022-11-03 04:05:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:48,702 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-03 04:05:48,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-03 04:05:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:05:48,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:48,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 04:05:48,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:48,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:48,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash 120082237, now seen corresponding path program 1 times [2022-11-03 04:05:48,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:48,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244440415] [2022-11-03 04:05:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:48,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:49,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:49,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244440415] [2022-11-03 04:05:49,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244440415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:49,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:49,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:05:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976413099] [2022-11-03 04:05:49,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:49,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:49,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:49,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:05:49,109 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.25) 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) [2022-11-03 04:05:49,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:49,176 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-03 04:05:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:05:49,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) 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 [2022-11-03 04:05:49,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:49,178 INFO L225 Difference]: With dead ends: 30 [2022-11-03 04:05:49,178 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 04:05:49,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:05:49,183 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:49,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 27 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:05:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 04:05:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2022-11-03 04:05:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.8) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-03 04:05:49,194 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 5 [2022-11-03 04:05:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:49,194 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-03 04:05:49,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) 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) [2022-11-03 04:05:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-03 04:05:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:05:49,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:49,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 04:05:49,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 04:05:49,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:49,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:49,204 INFO L85 PathProgramCache]: Analyzing trace with hash 120082236, now seen corresponding path program 1 times [2022-11-03 04:05:49,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:49,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593508547] [2022-11-03 04:05:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:49,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:49,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:49,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593508547] [2022-11-03 04:05:49,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593508547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:49,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:49,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:05:49,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279986366] [2022-11-03 04:05:49,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:49,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:49,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:49,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:49,257 INFO L87 Difference]: Start difference. First operand 22 states and 27 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) [2022-11-03 04:05:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:49,304 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-11-03 04:05:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:05:49,305 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 [2022-11-03 04:05:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:49,307 INFO L225 Difference]: With dead ends: 21 [2022-11-03 04:05:49,307 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 04:05:49,308 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 [2022-11-03 04:05:49,311 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:49,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:05:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 04:05:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-03 04:05:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.6666666666666667) 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) [2022-11-03 04:05:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-03 04:05:49,323 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 5 [2022-11-03 04:05:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:49,324 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-03 04:05:49,324 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) [2022-11-03 04:05:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-03 04:05:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 04:05:49,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:49,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 04:05:49,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 04:05:49,326 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash -572366656, now seen corresponding path program 1 times [2022-11-03 04:05:49,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:49,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476275411] [2022-11-03 04:05:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:49,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:49,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:49,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476275411] [2022-11-03 04:05:49,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476275411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:49,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:49,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:05:49,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833353013] [2022-11-03 04:05:49,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:49,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:49,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:49,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:49,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:49,408 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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) [2022-11-03 04:05:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:49,438 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-03 04:05:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:05:49,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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 [2022-11-03 04:05:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:49,440 INFO L225 Difference]: With dead ends: 21 [2022-11-03 04:05:49,440 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 04:05:49,441 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 [2022-11-03 04:05:49,442 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:49,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:05:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 04:05:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-03 04:05:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.6) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-03 04:05:49,448 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2022-11-03 04:05:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:49,448 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-03 04:05:49,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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) [2022-11-03 04:05:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-03 04:05:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 04:05:49,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:49,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 04:05:49,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 04:05:49,452 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:49,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:49,453 INFO L85 PathProgramCache]: Analyzing trace with hash -572417961, now seen corresponding path program 1 times [2022-11-03 04:05:49,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:49,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592110325] [2022-11-03 04:05:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:49,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:49,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592110325] [2022-11-03 04:05:49,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592110325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:49,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:49,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:05:49,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404989162] [2022-11-03 04:05:49,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:49,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:49,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:49,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:05:49,551 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:49,609 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-03 04:05:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:05:49,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 04:05:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:49,612 INFO L225 Difference]: With dead ends: 20 [2022-11-03 04:05:49,612 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 04:05:49,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:05:49,613 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:49,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:05:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 04:05:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-03 04:05:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-03 04:05:49,620 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 6 [2022-11-03 04:05:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:49,621 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-03 04:05:49,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-03 04:05:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 04:05:49,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:49,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 04:05:49,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 04:05:49,622 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:49,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash -572417960, now seen corresponding path program 1 times [2022-11-03 04:05:49,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:49,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456936428] [2022-11-03 04:05:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:49,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:49,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456936428] [2022-11-03 04:05:49,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456936428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:49,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:49,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:05:49,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105003226] [2022-11-03 04:05:49,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:49,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:49,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:49,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:49,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:05:49,860 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:49,951 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-11-03 04:05:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:05:49,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 04:05:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:49,955 INFO L225 Difference]: With dead ends: 22 [2022-11-03 04:05:49,955 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 04:05:49,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:05:49,958 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:49,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 04:05:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-11-03 04:05:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-03 04:05:49,967 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2022-11-03 04:05:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:49,967 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-03 04:05:49,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:49,968 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-03 04:05:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 04:05:49,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:49,968 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:49,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:05:49,969 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1883269226, now seen corresponding path program 1 times [2022-11-03 04:05:49,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:49,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488085078] [2022-11-03 04:05:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:49,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:50,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:50,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488085078] [2022-11-03 04:05:50,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488085078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:50,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:50,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:05:50,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590511007] [2022-11-03 04:05:50,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:50,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:05:50,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:05:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:05:50,295 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:50,557 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-11-03 04:05:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:05:50,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 04:05:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:50,559 INFO L225 Difference]: With dead ends: 36 [2022-11-03 04:05:50,559 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 04:05:50,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:05:50,560 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:50,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 59 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 04:05:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-11-03 04:05:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-03 04:05:50,563 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2022-11-03 04:05:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:50,564 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-03 04:05:50,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-03 04:05:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 04:05:50,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:50,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:50,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 04:05:50,565 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:50,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1747644125, now seen corresponding path program 1 times [2022-11-03 04:05:50,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:50,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595423250] [2022-11-03 04:05:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:50,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:50,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:50,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595423250] [2022-11-03 04:05:50,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595423250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:50,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:50,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:05:50,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885116191] [2022-11-03 04:05:50,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:50,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:05:50,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:05:50,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:05:50,661 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:50,776 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-11-03 04:05:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:05:50,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 04:05:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:50,777 INFO L225 Difference]: With dead ends: 27 [2022-11-03 04:05:50,777 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 04:05:50,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:05:50,779 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:50,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 04:05:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-03 04:05:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 25 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) [2022-11-03 04:05:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-03 04:05:50,792 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 10 [2022-11-03 04:05:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:50,793 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-03 04:05:50,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-03 04:05:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 04:05:50,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:50,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:50,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 04:05:50,795 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1747644126, now seen corresponding path program 1 times [2022-11-03 04:05:50,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:50,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872094090] [2022-11-03 04:05:50,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:50,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:51,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872094090] [2022-11-03 04:05:51,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872094090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:51,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:51,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:05:51,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493350838] [2022-11-03 04:05:51,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:51,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:05:51,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:51,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:05:51,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:05:51,545 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:52,049 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-11-03 04:05:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:05:52,050 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 04:05:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:52,051 INFO L225 Difference]: With dead ends: 30 [2022-11-03 04:05:52,051 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 04:05:52,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:05:52,052 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:52,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 18 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:05:52,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 04:05:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-03 04:05:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-03 04:05:52,055 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 10 [2022-11-03 04:05:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:52,055 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-03 04:05:52,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-03 04:05:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 04:05:52,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:52,056 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:52,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 04:05:52,057 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:52,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1571091704, now seen corresponding path program 1 times [2022-11-03 04:05:52,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:52,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263549384] [2022-11-03 04:05:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:52,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:52,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:52,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263549384] [2022-11-03 04:05:52,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263549384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:05:52,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419709726] [2022-11-03 04:05:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:52,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:52,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:52,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:52,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:05:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:05:52,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:52,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:52,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:05:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:52,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419709726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:52,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1939854543] [2022-11-03 04:05:52,905 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:05:52,906 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:05:52,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:05:52,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:05:52,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:05:52,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:52,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:05:53,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:05:53,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:05:53,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:05:53,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:05:53,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:53,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:53,408 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 04:05:53,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 04:05:53,609 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:05:53,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:05:53,849 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:05:53,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:05:53,999 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:05:56,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:05:56,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:05:56,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:05:56,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2022-11-03 04:05:56,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636312044] [2022-11-03 04:05:56,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:56,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 04:05:56,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 04:05:56,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-11-03 04:05:56,260 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 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) [2022-11-03 04:05:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:56,763 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-11-03 04:05:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:05:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 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 11 [2022-11-03 04:05:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:56,764 INFO L225 Difference]: With dead ends: 56 [2022-11-03 04:05:56,764 INFO L226 Difference]: Without dead ends: 56 [2022-11-03 04:05:56,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 04:05:56,766 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:56,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 121 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:05:56,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-03 04:05:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2022-11-03 04:05:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-03 04:05:56,769 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 11 [2022-11-03 04:05:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:56,770 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-03 04:05:56,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 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) [2022-11-03 04:05:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-03 04:05:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 04:05:56,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:56,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:56,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 04:05:56,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:56,988 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:56,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1657608132, now seen corresponding path program 1 times [2022-11-03 04:05:56,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:56,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347688515] [2022-11-03 04:05:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:56,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:57,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:57,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347688515] [2022-11-03 04:05:57,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347688515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:57,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:57,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:05:57,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415081149] [2022-11-03 04:05:57,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:57,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:57,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:57,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:57,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:57,171 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:57,198 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-03 04:05:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:05:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 04:05:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:57,199 INFO L225 Difference]: With dead ends: 31 [2022-11-03 04:05:57,199 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 04:05:57,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:57,200 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:57,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:05:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 04:05:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-03 04:05:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-03 04:05:57,203 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2022-11-03 04:05:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:57,203 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-03 04:05:57,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-03 04:05:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 04:05:57,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:57,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:57,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 04:05:57,205 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:05:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1459202557, now seen corresponding path program 1 times [2022-11-03 04:05:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:57,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237658469] [2022-11-03 04:05:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:05:57,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:57,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237658469] [2022-11-03 04:05:57,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237658469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:05:57,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420152406] [2022-11-03 04:05:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:57,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:57,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:57,685 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:57,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:05:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 04:05:57,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:57,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 04:05:57,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 04:05:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:05:58,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:05:58,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420152406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467388127] [2022-11-03 04:05:58,390 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:05:58,391 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:05:58,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:05:58,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:05:58,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:05:58,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:58,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:05:58,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:05:58,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:05:58,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:05:58,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:05:58,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:58,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:58,810 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 04:05:58,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 04:05:58,998 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:05:58,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:05:59,181 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:05:59,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:05:59,265 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:06:01,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1138#(and (= |ULTIMATE.start_cstrncpy_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|)) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:06:01,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:06:01,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:06:01,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-03 04:06:01,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804590709] [2022-11-03 04:06:01,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:01,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 04:06:01,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:01,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 04:06:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-11-03 04:06:01,634 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2022-11-03 04:06:02,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:02,356 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-11-03 04:06:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:06:02,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 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 12 [2022-11-03 04:06:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:02,358 INFO L225 Difference]: With dead ends: 37 [2022-11-03 04:06:02,358 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 04:06:02,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-11-03 04:06:02,359 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:02,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 29 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:06:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 04:06:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-11-03 04:06:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-03 04:06:02,363 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2022-11-03 04:06:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:02,364 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-03 04:06:02,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2022-11-03 04:06:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-03 04:06:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 04:06:02,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:02,365 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:02,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:02,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 04:06:02,575 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:06:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:02,575 INFO L85 PathProgramCache]: Analyzing trace with hash 473190542, now seen corresponding path program 1 times [2022-11-03 04:06:02,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:02,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851990671] [2022-11-03 04:06:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:02,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:03,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:03,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851990671] [2022-11-03 04:06:03,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851990671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:06:03,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121004725] [2022-11-03 04:06:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:03,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:03,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:03,246 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:03,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:06:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:03,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 04:06:03,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:03,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 04:06:03,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 04:06:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:03,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:04,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121004725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:04,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540726983] [2022-11-03 04:06:04,332 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 04:06:04,332 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:06:04,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:06:04,333 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:06:04,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:06:04,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:04,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:06:04,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:06:04,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:04,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:04,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:04,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-03 04:06:04,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:04,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:04,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 04:06:04,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 04:06:04,881 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:06:09,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1327#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= |ULTIMATE.start_main_~length~0#1| 1) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (= (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1) |ULTIMATE.start_cstrncpy_~us~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~n2~0#1| 2147483645) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (not (= 0 (+ |ULTIMATE.start_cstrncpy_~n2~0#1| 1))) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= |ULTIMATE.start_cstrncpy_~src~0#1.offset| 1) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~dst~0#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length~0#1|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1)) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_cstrncpy_~us~0#1.base| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:06:09,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:06:09,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:06:09,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2022-11-03 04:06:09,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825393535] [2022-11-03 04:06:09,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:09,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 04:06:09,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:09,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 04:06:09,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 04:06:09,368 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:12,808 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-11-03 04:06:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:06:12,809 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 04:06:12,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:12,809 INFO L225 Difference]: With dead ends: 36 [2022-11-03 04:06:12,809 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 04:06:12,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=524, Invalid=3016, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 04:06:12,812 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:12,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 32 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:06:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 04:06:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-03 04:06:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-03 04:06:12,814 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2022-11-03 04:06:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:12,815 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-03 04:06:12,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-03 04:06:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 04:06:12,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:12,816 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:12,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:13,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 04:06:13,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:06:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1739384785, now seen corresponding path program 2 times [2022-11-03 04:06:13,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:13,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703854022] [2022-11-03 04:06:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:13,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:13,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703854022] [2022-11-03 04:06:13,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703854022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:06:13,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349512806] [2022-11-03 04:06:13,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:06:13,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:13,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:13,561 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:13,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 04:06:13,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 04:06:13,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:13,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 04:06:13,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:13,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 04:06:13,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:06:13,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-03 04:06:14,133 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:14,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-03 04:06:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:14,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:14,645 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_31| Int) (v_ArrVal_210 (Array Int Int))) (or (<= (+ 3 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_31|) (select |c_#length| |c_ULTIMATE.start_cstrncpy_~src~0#1.base|)) (not (<= |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_31| |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) (not (<= 0 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_31|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_31| 1)) 0))) is different from false [2022-11-03 04:06:14,684 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:14,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-03 04:06:14,695 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:14,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-11-03 04:06:14,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:06:14,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:06:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 04:06:14,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349512806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:14,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1253930279] [2022-11-03 04:06:14,866 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:06:14,866 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:06:14,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:06:14,867 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:06:14,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:06:14,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:14,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:06:14,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:06:14,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:06:15,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:06:15,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:06:15,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:15,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:15,203 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 04:06:15,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 04:06:15,331 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:06:15,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:06:15,466 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:06:15,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:06:15,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:06:17,034 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1545#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:06:17,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:06:17,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:06:17,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-11-03 04:06:17,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639080476] [2022-11-03 04:06:17,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:17,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 04:06:17,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:17,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 04:06:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1344, Unknown=2, NotChecked=74, Total=1560 [2022-11-03 04:06:17,037 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:17,638 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-11-03 04:06:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 04:06:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 04:06:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:17,639 INFO L225 Difference]: With dead ends: 34 [2022-11-03 04:06:17,639 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 04:06:17,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=266, Invalid=2286, Unknown=2, NotChecked=98, Total=2652 [2022-11-03 04:06:17,641 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:17,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 141 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-11-03 04:06:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 04:06:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-03 04:06:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-03 04:06:17,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2022-11-03 04:06:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:17,644 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-03 04:06:17,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-03 04:06:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 04:06:17,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:17,645 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-03 04:06:17,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:17,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:17,851 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:06:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash -58765044, now seen corresponding path program 3 times [2022-11-03 04:06:17,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:17,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900573864] [2022-11-03 04:06:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:18,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:18,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900573864] [2022-11-03 04:06:18,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900573864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:06:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504920870] [2022-11-03 04:06:18,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:06:18,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:18,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:18,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:18,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:06:18,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:06:18,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 04:06:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:18,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:06:18,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:18,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 04:06:19,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:19,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 04:06:19,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:19,204 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:19,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-03 04:06:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:19,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:19,921 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_40| Int) (v_ArrVal_249 Int)) (or (not (<= |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_40| |c_ULTIMATE.start_cstrncpy_~dst~0#1.offset|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_40| v_ArrVal_249)) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0))) is different from false [2022-11-03 04:06:47,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1210 treesize of output 1162 [2022-11-03 04:06:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-03 04:06:52,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504920870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:52,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1076592802] [2022-11-03 04:06:52,017 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:06:52,018 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:06:52,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:06:52,018 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:06:52,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:06:52,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:52,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:06:52,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:06:52,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:06:52,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:06:52,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:06:52,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:52,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:52,336 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 04:06:52,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 04:06:52,475 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:06:52,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:06:52,610 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:06:52,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:06:52,666 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:06:54,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1790#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:06:54,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:06:54,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:06:54,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2022-11-03 04:06:54,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916218187] [2022-11-03 04:06:54,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:54,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 04:06:54,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 04:06:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1657, Unknown=17, NotChecked=82, Total=1892 [2022-11-03 04:06:54,503 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:59,917 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-11-03 04:06:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:06:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-03 04:06:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:59,918 INFO L225 Difference]: With dead ends: 38 [2022-11-03 04:06:59,919 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 04:06:59,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=260, Invalid=2696, Unknown=18, NotChecked=106, Total=3080 [2022-11-03 04:06:59,920 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:59,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 71 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 178 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-11-03 04:06:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 04:06:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-03 04:06:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-03 04:06:59,923 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2022-11-03 04:06:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:59,923 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-03 04:06:59,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-03 04:06:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 04:06:59,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:59,925 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-03 04:06:59,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:00,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 04:07:00,135 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:07:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:00,135 INFO L85 PathProgramCache]: Analyzing trace with hash 40479598, now seen corresponding path program 4 times [2022-11-03 04:07:00,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:00,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225150019] [2022-11-03 04:07:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:00,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:00,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225150019] [2022-11-03 04:07:00,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225150019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972347893] [2022-11-03 04:07:00,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:07:00,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:00,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:00,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:00,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 04:07:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:00,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 04:07:00,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:00,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:01,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:01,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972347893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:01,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1253242746] [2022-11-03 04:07:01,293 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:07:01,293 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:07:01,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:07:01,294 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:07:01,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:07:01,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:01,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:07:01,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:07:01,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:01,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:01,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:01,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:01,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:01,616 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 04:07:01,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 04:07:01,739 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:07:01,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:07:01,930 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:07:01,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:07:02,023 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:07:04,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2041#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:07:04,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:07:04,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:07:04,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-03 04:07:04,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828839321] [2022-11-03 04:07:04,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:04,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 04:07:04,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:04,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 04:07:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2022-11-03 04:07:04,332 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:04,913 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-11-03 04:07:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 04:07:04,914 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 04:07:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:04,914 INFO L225 Difference]: With dead ends: 30 [2022-11-03 04:07:04,914 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 04:07:04,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 04:07:04,916 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:04,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 25 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:07:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 04:07:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-03 04:07:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-11-03 04:07:04,918 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2022-11-03 04:07:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:04,918 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-11-03 04:07:04,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-11-03 04:07:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 04:07:04,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:04,923 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-03 04:07:04,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:05,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:05,143 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:07:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:05,143 INFO L85 PathProgramCache]: Analyzing trace with hash 363164487, now seen corresponding path program 5 times [2022-11-03 04:07:05,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:05,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780095849] [2022-11-03 04:07:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:05,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:06,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:06,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780095849] [2022-11-03 04:07:06,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780095849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:06,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308346738] [2022-11-03 04:07:06,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:07:06,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:06,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:06,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:06,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 04:07:06,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 04:07:06,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:07:06,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-03 04:07:06,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:06,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 04:07:06,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:06,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-03 04:07:07,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 04:07:07,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 04:07:07,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 04:07:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:07,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:07,183 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_337 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_337) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2022-11-03 04:07:07,193 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_337 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_337) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2022-11-03 04:07:07,203 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_337 (Array Int Int)) (v_ArrVal_336 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_336) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_337) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2022-11-03 04:07:07,213 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_337 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_337) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2022-11-03 04:07:07,239 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_337 (Array Int Int)) (v_ArrVal_335 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_335) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_337) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2022-11-03 04:07:07,252 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_337 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_337) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2022-11-03 04:07:07,263 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:07:07,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-03 04:07:07,273 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:07:07,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-03 04:07:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 23 not checked. [2022-11-03 04:07:07,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308346738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:07,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167892621] [2022-11-03 04:07:07,485 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:07:07,485 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:07:07,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:07:07,486 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:07:07,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:07:07,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:07,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:07:07,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:07:07,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:07,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:07,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:07,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:07,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:07,795 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 04:07:07,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 04:07:07,928 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:07:07,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:07:08,058 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:07:08,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:07:08,123 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:07:09,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2322#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:07:09,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:07:09,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:07:09,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 38 [2022-11-03 04:07:09,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881225980] [2022-11-03 04:07:09,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:09,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 04:07:09,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 04:07:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1514, Unknown=6, NotChecked=498, Total=2162 [2022-11-03 04:07:09,710 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 39 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:10,737 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-11-03 04:07:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 04:07:10,738 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 04:07:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:10,739 INFO L225 Difference]: With dead ends: 48 [2022-11-03 04:07:10,739 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 04:07:10,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=292, Invalid=2695, Unknown=7, NotChecked=666, Total=3660 [2022-11-03 04:07:10,742 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 38 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:10,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 334 Invalid, 0 Unknown, 188 Unchecked, 0.3s Time] [2022-11-03 04:07:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 04:07:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-11-03 04:07:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-11-03 04:07:10,745 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2022-11-03 04:07:10,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:10,745 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-11-03 04:07:10,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-11-03 04:07:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 04:07:10,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:10,747 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-03 04:07:10,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:10,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:10,951 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:07:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1257833431, now seen corresponding path program 6 times [2022-11-03 04:07:10,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:10,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353449428] [2022-11-03 04:07:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:10,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:11,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:11,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353449428] [2022-11-03 04:07:11,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353449428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:11,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308355446] [2022-11-03 04:07:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:07:11,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:11,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:11,645 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:11,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 04:07:11,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:07:11,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:07:11,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 04:07:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:11,893 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 04:07:11,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 04:07:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:12,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:12,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308355446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:12,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220794321] [2022-11-03 04:07:12,607 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:07:12,607 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:07:12,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:07:12,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:07:12,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:07:12,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:12,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:07:12,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:12,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:12,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:12,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:12,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:12,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:12,905 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 04:07:12,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 04:07:13,035 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:07:13,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:07:13,191 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:07:13,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:07:13,260 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:07:15,511 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2639#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:07:15,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:07:15,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:07:15,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-03 04:07:15,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297951529] [2022-11-03 04:07:15,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:15,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 04:07:15,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 04:07:15,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 04:07:15,514 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 33 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:16,225 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-11-03 04:07:16,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 04:07:16,226 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-03 04:07:16,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:16,227 INFO L225 Difference]: With dead ends: 36 [2022-11-03 04:07:16,227 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 04:07:16,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=447, Invalid=2309, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 04:07:16,229 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 106 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:16,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 33 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:07:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 04:07:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-11-03 04:07:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-11-03 04:07:16,232 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-11-03 04:07:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:16,233 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-11-03 04:07:16,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-11-03 04:07:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 04:07:16,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:16,234 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2022-11-03 04:07:16,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:16,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:16,450 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:07:16,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:16,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1553600894, now seen corresponding path program 7 times [2022-11-03 04:07:16,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:16,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257208653] [2022-11-03 04:07:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:16,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:17,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:17,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257208653] [2022-11-03 04:07:17,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257208653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:17,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4829210] [2022-11-03 04:07:17,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:07:17,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:17,752 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:17,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 04:07:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:17,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-03 04:07:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:17,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 04:07:18,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 04:07:18,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 04:07:18,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 04:07:18,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 04:07:18,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 04:07:18,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 04:07:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:18,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:18,707 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_443 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_443) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2022-11-03 04:07:18,719 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_443 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_443) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2022-11-03 04:07:18,731 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_443 (Array Int Int)) (v_ArrVal_442 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_442) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_443) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)))) is different from false [2022-11-03 04:07:18,744 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_443 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_443) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2022-11-03 04:07:18,756 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_441 (Array Int Int)) (v_ArrVal_443 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_441) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_443) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2022-11-03 04:07:18,768 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_443 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_443) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2022-11-03 04:07:18,779 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_440 (Array Int Int)) (v_ArrVal_443 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_440) |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_443) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2022-11-03 04:07:18,791 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_443 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_443) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0)) is different from false [2022-11-03 04:07:18,799 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:07:18,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-03 04:07:18,808 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:07:18,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-03 04:07:18,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:07:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 39 not checked. [2022-11-03 04:07:19,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4829210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:19,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330066778] [2022-11-03 04:07:19,188 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:07:19,188 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:07:19,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:07:19,189 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:07:19,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:07:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:19,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:07:19,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:19,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:19,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:19,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:19,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:19,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:19,477 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 04:07:19,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 04:07:19,606 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:07:19,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:07:19,765 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:07:19,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:07:19,841 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:07:22,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2982#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:07:22,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:07:22,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:07:22,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 48 [2022-11-03 04:07:22,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971771525] [2022-11-03 04:07:22,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:22,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 04:07:22,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:22,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 04:07:22,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2201, Unknown=8, NotChecked=808, Total=3192 [2022-11-03 04:07:22,163 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:23,866 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-11-03 04:07:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 04:07:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-03 04:07:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:23,867 INFO L225 Difference]: With dead ends: 58 [2022-11-03 04:07:23,867 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 04:07:23,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=324, Invalid=3732, Unknown=8, NotChecked=1048, Total=5112 [2022-11-03 04:07:23,871 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:23,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 103 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 657 Invalid, 0 Unknown, 240 Unchecked, 0.5s Time] [2022-11-03 04:07:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 04:07:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-11-03 04:07:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-11-03 04:07:23,874 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2022-11-03 04:07:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:23,874 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-11-03 04:07:23,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:23,875 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-11-03 04:07:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 04:07:23,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:23,875 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2022-11-03 04:07:23,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:24,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:24,087 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:07:24,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2025965028, now seen corresponding path program 8 times [2022-11-03 04:07:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:24,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033362506] [2022-11-03 04:07:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:24,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:24,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033362506] [2022-11-03 04:07:24,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033362506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:24,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106566198] [2022-11-03 04:07:24,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:07:24,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:24,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:24,771 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:24,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 04:07:25,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 04:07:25,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:07:25,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 04:07:25,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:25,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:26,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 04:07:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:26,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106566198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:26,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647157485] [2022-11-03 04:07:26,210 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:07:26,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:07:26,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:07:26,210 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:07:26,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:07:26,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:26,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 04:07:26,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:26,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:26,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:26,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:26,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:26,565 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 04:07:26,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 04:07:26,706 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:07:26,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:07:26,871 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 04:07:26,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:07:26,949 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:07:29,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3360#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:07:29,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:07:29,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:07:29,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-11-03 04:07:29,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768495003] [2022-11-03 04:07:29,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:29,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 04:07:29,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 04:07:29,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1823, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 04:07:29,296 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 38 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:30,002 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-11-03 04:07:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 04:07:30,003 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-03 04:07:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:30,003 INFO L225 Difference]: With dead ends: 42 [2022-11-03 04:07:30,003 INFO L226 Difference]: Without dead ends: 42 [2022-11-03 04:07:30,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=565, Invalid=2975, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 04:07:30,008 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 115 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:30,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 37 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:07:30,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-03 04:07:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-11-03 04:07:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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) [2022-11-03 04:07:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-11-03 04:07:30,013 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2022-11-03 04:07:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:30,014 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-11-03 04:07:30,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-11-03 04:07:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 04:07:30,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:30,015 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1] [2022-11-03 04:07:30,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:30,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:30,223 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-03 04:07:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:30,223 INFO L85 PathProgramCache]: Analyzing trace with hash 350184125, now seen corresponding path program 9 times [2022-11-03 04:07:30,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:30,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169207518] [2022-11-03 04:07:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:30,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:31,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:31,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169207518] [2022-11-03 04:07:31,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169207518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:31,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779555494] [2022-11-03 04:07:31,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:07:31,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:31,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:31,821 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:31,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7665e1f-ed06-46d1-bb29-8c20be81e12e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 04:07:32,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:07:32,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:07:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-03 04:07:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:32,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 04:07:32,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:32,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 04:07:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:33,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 04:07:33,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:33,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 04:07:33,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:33,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 04:07:33,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:33,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 04:07:33,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:07:33,963 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:07:33,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-03 04:07:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:33,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:47,625 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_566 Int) (v_ArrVal_564 Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118| Int) (v_ArrVal_563 Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| Int)) (or (< (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| 1) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118|) (not (<= |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| |c_ULTIMATE.start_cstrncpy_~dst~0#1.offset|)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base|) |c_ULTIMATE.start_cstrncpy_#t~post3#1.offset| v_ArrVal_563)))) (store .cse0 |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| (store (store (select .cse0 |c_ULTIMATE.start_cstrncpy_~dst~0#1.base|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| v_ArrVal_564) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118| v_ArrVal_566))) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0))) is different from false [2022-11-03 04:09:23,270 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_566 Int) (v_ArrVal_564 Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118| Int) (v_ArrVal_563 Int) (v_ArrVal_561 Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| Int)) (or (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base|) |c_ULTIMATE.start_cstrncpy_#t~post3#1.offset| v_ArrVal_561)))) (store .cse0 |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| (store (store (store (select .cse0 |c_ULTIMATE.start_cstrncpy_~dst~0#1.base|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122| v_ArrVal_563) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| v_ArrVal_564) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118| v_ArrVal_566))) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0) (< (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| 1) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118|) (< (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122| 1) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120|) (not (<= |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122| |c_ULTIMATE.start_cstrncpy_~dst~0#1.offset|)))) is different from false [2022-11-03 04:10:04,975 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_566 Int) (v_ArrVal_564 Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118| Int) (v_ArrVal_563 Int) (v_ArrVal_561 Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_124| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122| Int) (v_ArrVal_558 Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| Int)) (or (< (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| 1) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118|) (< (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122| 1) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120|) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base|) |c_ULTIMATE.start_cstrncpy_#t~post3#1.offset| v_ArrVal_558)))) (store .cse0 |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| (store (store (store (store (select .cse0 |c_ULTIMATE.start_cstrncpy_~dst~0#1.base|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_124| v_ArrVal_561) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122| v_ArrVal_563) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| v_ArrVal_564) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118| v_ArrVal_566))) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0) (not (<= |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_124| |c_ULTIMATE.start_cstrncpy_~dst~0#1.offset|)) (< (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_124| 1) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122|))) is different from false [2022-11-03 04:10:07,058 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_566 Int) (v_ArrVal_564 Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118| Int) (v_ArrVal_563 Int) (|v_ULTIMATE.start_cstrncpy_~dst~0#1.base_102| Int) (v_ArrVal_561 Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_126| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_124| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122| Int) (v_ArrVal_558 Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| Int)) (or (< (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| 1) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118|) (< (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_126| 1) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_124|) (< (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122| 1) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120|) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_cstrncpy_~dst~0#1.base_102| (store (store (store (store (store (select |c_#memory_int| |v_ULTIMATE.start_cstrncpy_~dst~0#1.base_102|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_126| v_ArrVal_558) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_124| v_ArrVal_561) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122| v_ArrVal_563) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_120| v_ArrVal_564) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_118| v_ArrVal_566)) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|)) 0) (< (+ |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_124| 1) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_122|) (not (<= |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_126| |c_ULTIMATE.start_cstrncpy_~dst~0#1.offset|)))) is different from false [2022-11-03 04:10:07,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99370 treesize of output 98986