./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f1ad2d5826e88851ec05294e79547a11a54665f4a2cf6f0e66f9eabed656148f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:32:13,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:32:13,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:32:13,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:32:13,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:32:13,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:32:13,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:32:13,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:32:13,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:32:13,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:32:13,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:32:13,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:32:13,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:32:13,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:32:13,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:32:13,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:32:13,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:32:13,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:32:13,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:32:13,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:32:13,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:32:13,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:32:13,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:32:13,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:32:13,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:32:13,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:32:13,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:32:13,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:32:13,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:32:13,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:32:13,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:32:13,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:32:13,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:32:13,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:32:13,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:32:13,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:32:13,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:32:13,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:32:13,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:32:13,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:32:13,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:32:13,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-19 08:32:13,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:32:13,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:32:13,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:32:13,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:32:13,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:32:13,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:32:13,189 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:32:13,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:32:13,190 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:32:13,190 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:32:13,190 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:32:13,190 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:32:13,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:32:13,191 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:32:13,191 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:32:13,191 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:32:13,191 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:32:13,191 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:32:13,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:32:13,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:32:13,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:32:13,193 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:32:13,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:32:13,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:32:13,193 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:32:13,193 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:32:13,194 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:32:13,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:32:13,194 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:32:13,194 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:32:13,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:32:13,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:32:13,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:32:13,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:32:13,195 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:32:13,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:32:13,196 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:32:13,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:32:13,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:32:13,196 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_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1ad2d5826e88851ec05294e79547a11a54665f4a2cf6f0e66f9eabed656148f [2022-11-19 08:32:13,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:32:13,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:32:13,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:32:13,608 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:32:13,609 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:32:13,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i [2022-11-19 08:32:13,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/data/ff126ee12/d4f45836d55b4865b10d566c71177cc0/FLAGfeed73aab [2022-11-19 08:32:14,293 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:32:14,294 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i [2022-11-19 08:32:14,307 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/data/ff126ee12/d4f45836d55b4865b10d566c71177cc0/FLAGfeed73aab [2022-11-19 08:32:14,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/data/ff126ee12/d4f45836d55b4865b10d566c71177cc0 [2022-11-19 08:32:14,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:32:14,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:32:14,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:32:14,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:32:14,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:32:14,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:32:14" (1/1) ... [2022-11-19 08:32:14,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c176af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:14, skipping insertion in model container [2022-11-19 08:32:14,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:32:14" (1/1) ... [2022-11-19 08:32:14,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:32:14,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:32:14,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:32:15,003 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:32:15,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:32:15,096 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:32:15,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15 WrapperNode [2022-11-19 08:32:15,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:32:15,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:32:15,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:32:15,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:32:15,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,142 INFO L138 Inliner]: procedures = 111, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2022-11-19 08:32:15,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:32:15,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:32:15,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:32:15,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:32:15,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,171 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:32:15,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:32:15,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:32:15,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:32:15,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (1/1) ... [2022-11-19 08:32:15,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:32:15,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:15,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:32:15,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:32:15,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:32:15,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:32:15,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:32:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:32:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:32:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:32:15,379 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:32:15,381 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:32:15,692 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:32:15,774 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:32:15,778 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:32:15,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:32:15 BoogieIcfgContainer [2022-11-19 08:32:15,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:32:15,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:32:15,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:32:15,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:32:15,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:32:14" (1/3) ... [2022-11-19 08:32:15,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc387a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:32:15, skipping insertion in model container [2022-11-19 08:32:15,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:15" (2/3) ... [2022-11-19 08:32:15,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc387a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:32:15, skipping insertion in model container [2022-11-19 08:32:15,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:32:15" (3/3) ... [2022-11-19 08:32:15,796 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-2.i [2022-11-19 08:32:15,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:32:15,820 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-19 08:32:15,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:32:15,900 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;@45acbe3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:32:15,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-19 08:32:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 2.235294117647059) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:32:15,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:15,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:32:15,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:15,918 INFO L85 PathProgramCache]: Analyzing trace with hash 4016, now seen corresponding path program 1 times [2022-11-19 08:32:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:15,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702349265] [2022-11-19 08:32:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:15,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:16,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:16,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702349265] [2022-11-19 08:32:16,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702349265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:16,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:16,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:32:16,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187084080] [2022-11-19 08:32:16,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:16,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:32:16,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:16,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:32:16,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:16,387 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 2.235294117647059) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:16,436 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-11-19 08:32:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:32:16,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-19 08:32:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:16,462 INFO L225 Difference]: With dead ends: 30 [2022-11-19 08:32:16,463 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 08:32:16,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:16,466 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 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 [2022-11-19 08:32:16,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 08:32:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-19 08:32:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 2.0) 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) [2022-11-19 08:32:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-19 08:32:16,502 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 2 [2022-11-19 08:32:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:16,502 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-19 08:32:16,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-19 08:32:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:32:16,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:16,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:32:16,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:32:16,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash 4017, now seen corresponding path program 1 times [2022-11-19 08:32:16,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:16,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869747986] [2022-11-19 08:32:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:16,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:16,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:16,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869747986] [2022-11-19 08:32:16,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869747986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:16,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:16,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:32:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488699871] [2022-11-19 08:32:16,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:16,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:32:16,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:16,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:32:16,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:16,802 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:16,835 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-19 08:32:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:32:16,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-19 08:32:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:16,837 INFO L225 Difference]: With dead ends: 28 [2022-11-19 08:32:16,837 INFO L226 Difference]: Without dead ends: 28 [2022-11-19 08:32:16,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:16,839 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:16,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-19 08:32:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-19 08:32:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-19 08:32:16,843 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 2 [2022-11-19 08:32:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:16,844 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-19 08:32:16,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-19 08:32:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:32:16,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:16,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:32:16,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:32:16,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:16,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash 124485, now seen corresponding path program 1 times [2022-11-19 08:32:16,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:16,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849033102] [2022-11-19 08:32:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:16,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:16,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:16,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849033102] [2022-11-19 08:32:16,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849033102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:16,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:16,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:32:16,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812125264] [2022-11-19 08:32:16,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:16,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:32:16,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:16,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:32:16,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:16,894 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:16,942 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-19 08:32:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:32:16,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:32:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:16,943 INFO L225 Difference]: With dead ends: 27 [2022-11-19 08:32:16,944 INFO L226 Difference]: Without dead ends: 27 [2022-11-19 08:32:16,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:16,945 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:16,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-19 08:32:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-19 08:32:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-19 08:32:16,960 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 3 [2022-11-19 08:32:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:16,961 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-19 08:32:16,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-19 08:32:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:32:16,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:16,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:32:16,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:32:16,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:16,963 INFO L85 PathProgramCache]: Analyzing trace with hash 124486, now seen corresponding path program 1 times [2022-11-19 08:32:16,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:16,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733277279] [2022-11-19 08:32:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:16,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:17,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:17,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733277279] [2022-11-19 08:32:17,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733277279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:17,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:17,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:32:17,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053145327] [2022-11-19 08:32:17,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:17,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:32:17,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:17,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:32:17,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:17,202 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:17,249 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-19 08:32:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:32:17,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:32:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:17,252 INFO L225 Difference]: With dead ends: 26 [2022-11-19 08:32:17,252 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 08:32:17,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:17,258 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:17,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 08:32:17,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-19 08:32:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-19 08:32:17,263 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 3 [2022-11-19 08:32:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:17,263 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-19 08:32:17,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-19 08:32:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:32:17,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:17,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:17,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:32:17,264 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:17,265 INFO L85 PathProgramCache]: Analyzing trace with hash -932435257, now seen corresponding path program 1 times [2022-11-19 08:32:17,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:17,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019118596] [2022-11-19 08:32:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:17,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:17,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:17,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019118596] [2022-11-19 08:32:17,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019118596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:17,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:17,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:17,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455980845] [2022-11-19 08:32:17,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:17,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:32:17,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:17,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:32:17,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:17,326 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:17,375 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-19 08:32:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:32:17,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:32:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:17,378 INFO L225 Difference]: With dead ends: 30 [2022-11-19 08:32:17,378 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 08:32:17,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:17,382 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:17,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 08:32:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-11-19 08:32:17,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-19 08:32:17,396 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 7 [2022-11-19 08:32:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:17,397 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-19 08:32:17,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-19 08:32:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:32:17,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:17,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:17,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:32:17,398 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash -932461262, now seen corresponding path program 1 times [2022-11-19 08:32:17,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:17,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968740229] [2022-11-19 08:32:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:17,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:17,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:17,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968740229] [2022-11-19 08:32:17,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968740229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:17,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:17,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:17,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418024064] [2022-11-19 08:32:17,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:17,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:32:17,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:17,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:32:17,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:17,508 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:17,562 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-19 08:32:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:32:17,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:32:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:17,563 INFO L225 Difference]: With dead ends: 26 [2022-11-19 08:32:17,563 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 08:32:17,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:17,566 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:17,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 17 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 08:32:17,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-19 08:32:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-19 08:32:17,576 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 7 [2022-11-19 08:32:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:17,576 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-19 08:32:17,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-19 08:32:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:32:17,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:17,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:17,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:32:17,578 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:17,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:17,579 INFO L85 PathProgramCache]: Analyzing trace with hash -932461261, now seen corresponding path program 1 times [2022-11-19 08:32:17,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:17,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867871000] [2022-11-19 08:32:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:17,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:17,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:17,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867871000] [2022-11-19 08:32:17,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867871000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:17,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:17,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:17,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417756533] [2022-11-19 08:32:17,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:17,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:17,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:17,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:17,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:17,776 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:17,843 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-19 08:32:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:32:17,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:32:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:17,844 INFO L225 Difference]: With dead ends: 39 [2022-11-19 08:32:17,845 INFO L226 Difference]: Without dead ends: 39 [2022-11-19 08:32:17,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:17,846 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:17,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 32 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-19 08:32:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2022-11-19 08:32:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-19 08:32:17,856 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 7 [2022-11-19 08:32:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:17,856 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-19 08:32:17,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-19 08:32:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:32:17,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:17,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:17,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:32:17,858 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:17,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:17,859 INFO L85 PathProgramCache]: Analyzing trace with hash -933260589, now seen corresponding path program 1 times [2022-11-19 08:32:17,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:17,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350901519] [2022-11-19 08:32:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:17,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:17,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:17,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350901519] [2022-11-19 08:32:17,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350901519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:17,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:17,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:17,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434571941] [2022-11-19 08:32:17,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:17,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:32:17,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:17,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:32:17,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:17,953 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:18,003 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-11-19 08:32:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:32:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:32:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:18,007 INFO L225 Difference]: With dead ends: 30 [2022-11-19 08:32:18,007 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 08:32:18,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:18,011 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:18,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 29 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:18,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 08:32:18,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 08:32:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-19 08:32:18,018 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 7 [2022-11-19 08:32:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:18,018 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-19 08:32:18,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-19 08:32:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:32:18,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:18,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:18,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:32:18,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:18,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:18,020 INFO L85 PathProgramCache]: Analyzing trace with hash -933260588, now seen corresponding path program 1 times [2022-11-19 08:32:18,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:18,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644946018] [2022-11-19 08:32:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:18,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:18,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:18,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644946018] [2022-11-19 08:32:18,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644946018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:18,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:18,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:18,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264856256] [2022-11-19 08:32:18,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:18,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:18,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:18,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:18,261 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:18,342 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-19 08:32:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:32:18,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:32:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:18,345 INFO L225 Difference]: With dead ends: 35 [2022-11-19 08:32:18,345 INFO L226 Difference]: Without dead ends: 35 [2022-11-19 08:32:18,345 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 [2022-11-19 08:32:18,348 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:18,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 45 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-19 08:32:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-11-19 08:32:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-19 08:32:18,365 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 7 [2022-11-19 08:32:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:18,366 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-19 08:32:18,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-19 08:32:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:32:18,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:18,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:18,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:32:18,367 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1158477073, now seen corresponding path program 1 times [2022-11-19 08:32:18,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351275981] [2022-11-19 08:32:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:18,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:18,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351275981] [2022-11-19 08:32:18,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351275981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:18,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:18,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:18,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844990005] [2022-11-19 08:32:18,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:18,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:32:18,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:32:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:18,440 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:18,499 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-11-19 08:32:18,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:32:18,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:32:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:18,500 INFO L225 Difference]: With dead ends: 30 [2022-11-19 08:32:18,500 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 08:32:18,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:18,501 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:18,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:18,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 08:32:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 08:32:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-19 08:32:18,504 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 8 [2022-11-19 08:32:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:18,505 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-19 08:32:18,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-19 08:32:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:32:18,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:18,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:18,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:32:18,506 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1158477074, now seen corresponding path program 1 times [2022-11-19 08:32:18,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:18,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225386580] [2022-11-19 08:32:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:18,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:18,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:18,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225386580] [2022-11-19 08:32:18,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225386580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:18,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:18,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:18,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261974252] [2022-11-19 08:32:18,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:18,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:18,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:18,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:18,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:18,698 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:18,805 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-19 08:32:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:32:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:32:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:18,812 INFO L225 Difference]: With dead ends: 35 [2022-11-19 08:32:18,812 INFO L226 Difference]: Without dead ends: 35 [2022-11-19 08:32:18,812 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 [2022-11-19 08:32:18,813 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:18,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 38 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:32:18,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-19 08:32:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-11-19 08:32:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-19 08:32:18,821 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 8 [2022-11-19 08:32:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:18,821 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-19 08:32:18,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-19 08:32:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:32:18,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:18,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:18,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:32:18,824 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:18,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1133692822, now seen corresponding path program 1 times [2022-11-19 08:32:18,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:18,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841539172] [2022-11-19 08:32:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:18,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:18,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:18,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841539172] [2022-11-19 08:32:18,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841539172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:18,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:18,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:32:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166812243] [2022-11-19 08:32:18,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:18,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:18,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:18,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:18,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:18,914 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:18,973 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-11-19 08:32:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:32:18,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:32:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:18,974 INFO L225 Difference]: With dead ends: 31 [2022-11-19 08:32:18,974 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 08:32:18,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:32:18,975 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:18,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 28 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 08:32:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 08:32:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.5) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-19 08:32:18,978 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 8 [2022-11-19 08:32:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:18,978 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-19 08:32:18,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-19 08:32:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:32:18,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:18,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:18,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:32:18,980 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:18,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1133692823, now seen corresponding path program 1 times [2022-11-19 08:32:18,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:18,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002576755] [2022-11-19 08:32:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:18,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:19,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:19,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002576755] [2022-11-19 08:32:19,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002576755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:19,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:19,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:32:19,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459822863] [2022-11-19 08:32:19,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:19,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:32:19,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:19,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:32:19,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:19,123 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:19,205 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-11-19 08:32:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:32:19,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:32:19,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:19,206 INFO L225 Difference]: With dead ends: 40 [2022-11-19 08:32:19,206 INFO L226 Difference]: Without dead ends: 40 [2022-11-19 08:32:19,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:32:19,207 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:19,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 38 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:32:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-19 08:32:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-19 08:32:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-19 08:32:19,210 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 8 [2022-11-19 08:32:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:19,211 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-19 08:32:19,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-19 08:32:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:32:19,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:19,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:19,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:32:19,212 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash 784724414, now seen corresponding path program 1 times [2022-11-19 08:32:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:19,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359424466] [2022-11-19 08:32:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:19,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:19,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:19,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359424466] [2022-11-19 08:32:19,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359424466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:19,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:19,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:32:19,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212546103] [2022-11-19 08:32:19,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:32:19,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:32:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:19,347 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:19,369 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-11-19 08:32:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:32:19,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:32:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:19,370 INFO L225 Difference]: With dead ends: 31 [2022-11-19 08:32:19,370 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 08:32:19,371 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 [2022-11-19 08:32:19,371 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:19,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 08:32:19,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-19 08:32:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 27 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) [2022-11-19 08:32:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-19 08:32:19,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 9 [2022-11-19 08:32:19,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:19,375 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-19 08:32:19,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:19,375 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-19 08:32:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:32:19,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:19,376 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:19,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:32:19,376 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:19,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2128303807, now seen corresponding path program 1 times [2022-11-19 08:32:19,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:19,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631872881] [2022-11-19 08:32:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:19,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:32:19,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631872881] [2022-11-19 08:32:19,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631872881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:19,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:19,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:32:19,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065531444] [2022-11-19 08:32:19,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:19,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:19,641 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:19,713 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-19 08:32:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:32:19,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 11 [2022-11-19 08:32:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:19,714 INFO L225 Difference]: With dead ends: 28 [2022-11-19 08:32:19,715 INFO L226 Difference]: Without dead ends: 28 [2022-11-19 08:32:19,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:32:19,716 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:19,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 15 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-19 08:32:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-19 08:32:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-19 08:32:19,718 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 11 [2022-11-19 08:32:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:19,718 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-19 08:32:19,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-19 08:32:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:32:19,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:19,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:19,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:32:19,720 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:19,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 656395043, now seen corresponding path program 1 times [2022-11-19 08:32:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:19,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504918304] [2022-11-19 08:32:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:19,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:20,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:20,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504918304] [2022-11-19 08:32:20,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504918304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:20,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:20,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:32:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868047341] [2022-11-19 08:32:20,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:20,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:32:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:32:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:32:20,086 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:20,294 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-11-19 08:32:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:32:20,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:32:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:20,295 INFO L225 Difference]: With dead ends: 38 [2022-11-19 08:32:20,295 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 08:32:20,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:32:20,296 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:20,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 51 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:32:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 08:32:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-11-19 08:32:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.4) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-19 08:32:20,299 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 12 [2022-11-19 08:32:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:20,300 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-19 08:32:20,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-19 08:32:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:32:20,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:20,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:20,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:32:20,302 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:20,302 INFO L85 PathProgramCache]: Analyzing trace with hash 656429864, now seen corresponding path program 1 times [2022-11-19 08:32:20,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:20,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301121591] [2022-11-19 08:32:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:20,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:20,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:20,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301121591] [2022-11-19 08:32:20,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301121591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:32:20,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252485116] [2022-11-19 08:32:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:20,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:20,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:20,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:20,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:32:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:20,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-19 08:32:20,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:20,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:21,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:32:21,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2022-11-19 08:32:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:21,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:21,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-19 08:32:21,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:21,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 08:32:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:21,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252485116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:21,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218291478] [2022-11-19 08:32:21,661 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:32:21,661 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:21,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:21,672 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:21,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:21,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:32:21,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:21,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:32:22,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:22,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,190 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:32:22,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:32:22,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:22,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:23,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:32:25,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1199#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:32:25,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:32:25,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:32:25,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-19 08:32:25,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283470535] [2022-11-19 08:32:25,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:32:25,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:32:25,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:32:25,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:32:25,292 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2022-11-19 08:32:25,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:25,492 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-11-19 08:32:25,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:32:25,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) Word has length 12 [2022-11-19 08:32:25,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:25,493 INFO L225 Difference]: With dead ends: 43 [2022-11-19 08:32:25,493 INFO L226 Difference]: Without dead ends: 43 [2022-11-19 08:32:25,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:32:25,494 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:25,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 132 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-19 08:32:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-19 08:32:25,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-11-19 08:32:25,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-11-19 08:32:25,496 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 12 [2022-11-19 08:32:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:25,497 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-11-19 08:32:25,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2022-11-19 08:32:25,497 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-11-19 08:32:25,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:32:25,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:25,497 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:25,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:25,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:32:25,705 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash 75156022, now seen corresponding path program 1 times [2022-11-19 08:32:25,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:25,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638643264] [2022-11-19 08:32:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:25,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:32:25,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:25,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638643264] [2022-11-19 08:32:25,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638643264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:25,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:25,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:32:25,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247695063] [2022-11-19 08:32:25,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:25,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:25,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:25,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:25,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:25,831 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:25,847 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-19 08:32:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:32:25,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:32:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:25,848 INFO L225 Difference]: With dead ends: 35 [2022-11-19 08:32:25,849 INFO L226 Difference]: Without dead ends: 35 [2022-11-19 08:32:25,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:25,849 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:25,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-19 08:32:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-19 08:32:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-19 08:32:25,858 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 13 [2022-11-19 08:32:25,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:25,858 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-19 08:32:25,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-19 08:32:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:32:25,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:25,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:25,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 08:32:25,861 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:25,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1125510717, now seen corresponding path program 1 times [2022-11-19 08:32:25,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:25,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944164272] [2022-11-19 08:32:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:25,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:26,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944164272] [2022-11-19 08:32:26,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944164272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:32:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383161767] [2022-11-19 08:32:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:26,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:26,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:26,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:26,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:32:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:26,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 08:32:26,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:26,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:26,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 08:32:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:26,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383161767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:26,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1917892118] [2022-11-19 08:32:26,876 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:32:26,876 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:26,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:26,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:26,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:26,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:26,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:32:26,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:27,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:32:27,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:27,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:27,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:27,190 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:32:27,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:32:27,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:27,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:27,794 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:32:30,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1458#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:32:30,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:32:30,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:32:30,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-19 08:32:30,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158449652] [2022-11-19 08:32:30,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:32:30,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:32:30,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:32:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:32:30,222 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 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) [2022-11-19 08:32:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:30,770 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-19 08:32:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:32:30,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 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) Word has length 13 [2022-11-19 08:32:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:30,771 INFO L225 Difference]: With dead ends: 41 [2022-11-19 08:32:30,772 INFO L226 Difference]: Without dead ends: 41 [2022-11-19 08:32:30,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:32:30,773 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 137 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:30,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 95 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:32:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-19 08:32:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-11-19 08:32:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.28125) internal successors, (41), 35 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) [2022-11-19 08:32:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-19 08:32:30,775 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2022-11-19 08:32:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:30,775 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-19 08:32:30,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 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) [2022-11-19 08:32:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-19 08:32:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:32:30,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:30,776 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:30,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:30,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:30,977 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:30,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1928498822, now seen corresponding path program 1 times [2022-11-19 08:32:30,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:30,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234195514] [2022-11-19 08:32:30,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:30,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:31,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:31,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234195514] [2022-11-19 08:32:31,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234195514] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:32:31,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024419758] [2022-11-19 08:32:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:31,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:31,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:31,478 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:31,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:32:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-19 08:32:31,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:31,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:32:31,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:31,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-19 08:32:31,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:32:31,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2022-11-19 08:32:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:31,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:32,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:32:32,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-19 08:32:32,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:32:32,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-11-19 08:32:32,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:32,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 08:32:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:32,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024419758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:32,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019776174] [2022-11-19 08:32:32,394 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 08:32:32,394 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:32,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:32,395 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:32,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:32,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:32,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:32:32,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:32,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:32:32,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:32,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:32,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:32,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-19 08:32:32,855 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:32:35,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1661#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:32:35,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:32:35,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:32:35,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-11-19 08:32:35,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113447015] [2022-11-19 08:32:35,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:32:35,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:32:35,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:35,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:32:35,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=847, Unknown=1, NotChecked=0, Total=992 [2022-11-19 08:32:35,740 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:36,129 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-19 08:32:36,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:32:36,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 08:32:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:36,131 INFO L225 Difference]: With dead ends: 40 [2022-11-19 08:32:36,131 INFO L226 Difference]: Without dead ends: 40 [2022-11-19 08:32:36,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=190, Invalid=1069, Unknown=1, NotChecked=0, Total=1260 [2022-11-19 08:32:36,132 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:36,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 110 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-19 08:32:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-19 08:32:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-19 08:32:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:36,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-19 08:32:36,134 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2022-11-19 08:32:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:36,134 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-19 08:32:36,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-19 08:32:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:32:36,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:36,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:36,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:36,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:36,336 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:36,337 INFO L85 PathProgramCache]: Analyzing trace with hash -564555932, now seen corresponding path program 1 times [2022-11-19 08:32:36,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:36,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936916104] [2022-11-19 08:32:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:36,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:36,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:36,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936916104] [2022-11-19 08:32:36,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936916104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:36,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:36,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:32:36,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169782143] [2022-11-19 08:32:36,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:36,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:32:36,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:36,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:32:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:32:36,596 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:36,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:36,672 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-11-19 08:32:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:36,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 08:32:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:36,673 INFO L225 Difference]: With dead ends: 41 [2022-11-19 08:32:36,673 INFO L226 Difference]: Without dead ends: 39 [2022-11-19 08:32:36,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:32:36,674 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:36,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:32:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-19 08:32:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-19 08:32:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-19 08:32:36,675 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 14 [2022-11-19 08:32:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:36,676 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-19 08:32:36,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-19 08:32:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:32:36,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:36,676 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:36,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 08:32:36,677 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:36,677 INFO L85 PathProgramCache]: Analyzing trace with hash 680763647, now seen corresponding path program 1 times [2022-11-19 08:32:36,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:36,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980859433] [2022-11-19 08:32:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:36,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:37,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980859433] [2022-11-19 08:32:37,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980859433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:32:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400618987] [2022-11-19 08:32:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:37,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:37,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:37,123 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:37,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:32:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 08:32:37,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:37,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:37,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:32:37,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 08:32:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:37,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:37,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-19 08:32:37,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-19 08:32:37,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-11-19 08:32:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:37,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400618987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:37,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951068121] [2022-11-19 08:32:37,876 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:32:37,877 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:37,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:37,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:37,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:37,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:37,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:32:37,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:38,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:32:38,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:38,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:38,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:38,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:38,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:38,170 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:32:38,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:32:38,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:38,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:38,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:38,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:32:41,918 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1960#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:32:41,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:32:41,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:32:41,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-19 08:32:41,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758502563] [2022-11-19 08:32:41,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:32:41,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:32:41,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:41,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:32:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-11-19 08:32:41,921 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:42,190 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-11-19 08:32:42,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:32:42,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:32:42,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:42,191 INFO L225 Difference]: With dead ends: 42 [2022-11-19 08:32:42,191 INFO L226 Difference]: Without dead ends: 42 [2022-11-19 08:32:42,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:32:42,193 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:42,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 111 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-11-19 08:32:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-19 08:32:42,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-11-19 08:32:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-19 08:32:42,194 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 16 [2022-11-19 08:32:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:42,195 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-19 08:32:42,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-19 08:32:42,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:32:42,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:42,195 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:42,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:42,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:42,401 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1869096757, now seen corresponding path program 2 times [2022-11-19 08:32:42,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:42,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859230768] [2022-11-19 08:32:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:42,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:43,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:43,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859230768] [2022-11-19 08:32:43,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859230768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:32:43,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462718805] [2022-11-19 08:32:43,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:32:43,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:43,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:43,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:43,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:32:43,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:32:43,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-19 08:32:43,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:43,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:32:43,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:43,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-19 08:32:43,869 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-11-19 08:32:43,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2022-11-19 08:32:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:44,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:44,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:32:44,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-11-19 08:32:44,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:32:44,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 65 [2022-11-19 08:32:44,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-11-19 08:32:44,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:44,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462718805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:44,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858188642] [2022-11-19 08:32:44,751 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 08:32:44,751 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:44,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:44,751 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:44,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:44,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:44,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:32:44,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:44,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:44,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:32:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:45,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:45,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:45,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-19 08:32:45,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:32:48,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2188#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~n~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:32:48,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:32:48,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:32:48,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-19 08:32:48,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764935844] [2022-11-19 08:32:48,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:32:48,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 08:32:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 08:32:48,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1435, Unknown=1, NotChecked=0, Total=1640 [2022-11-19 08:32:48,015 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 32 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:48,325 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-11-19 08:32:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:32:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 08:32:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:48,326 INFO L225 Difference]: With dead ends: 47 [2022-11-19 08:32:48,326 INFO L226 Difference]: Without dead ends: 47 [2022-11-19 08:32:48,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=243, Invalid=1736, Unknown=1, NotChecked=0, Total=1980 [2022-11-19 08:32:48,327 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:48,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 114 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-19 08:32:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-19 08:32:48,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-19 08:32:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-11-19 08:32:48,329 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 17 [2022-11-19 08:32:48,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:48,330 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-11-19 08:32:48,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-11-19 08:32:48,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:32:48,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:48,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 08:32:48,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:48,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:48,531 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:48,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:48,532 INFO L85 PathProgramCache]: Analyzing trace with hash 841918292, now seen corresponding path program 2 times [2022-11-19 08:32:48,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:48,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508537178] [2022-11-19 08:32:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:48,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:49,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:49,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508537178] [2022-11-19 08:32:49,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508537178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:32:49,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078420520] [2022-11-19 08:32:49,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:32:49,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:49,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:49,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:49,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:32:49,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:32:49,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:49,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 08:32:49,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:49,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:32:49,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:49,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 08:32:52,170 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-19 08:32:52,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2022-11-19 08:32:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:52,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:53,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:32:53,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-19 08:32:53,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-19 08:32:53,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:32:53,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 51 [2022-11-19 08:32:53,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:53,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:53,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078420520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:53,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1784668891] [2022-11-19 08:32:53,434 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:32:53,434 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:53,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:53,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:53,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:53,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:53,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:32:53,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:53,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:53,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:32:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:53,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:53,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:53,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:53,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:53,670 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:32:53,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:32:53,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:53,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:54,140 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:32:56,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2425#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:32:56,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:32:56,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:32:56,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-19 08:32:56,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127340360] [2022-11-19 08:32:56,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:32:56,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 08:32:56,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:56,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 08:32:56,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1412, Unknown=5, NotChecked=0, Total=1560 [2022-11-19 08:32:56,296 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:57,172 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-11-19 08:32:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:32:57,172 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 08:32:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:57,175 INFO L225 Difference]: With dead ends: 57 [2022-11-19 08:32:57,175 INFO L226 Difference]: Without dead ends: 57 [2022-11-19 08:32:57,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=223, Invalid=2124, Unknown=5, NotChecked=0, Total=2352 [2022-11-19 08:32:57,182 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:57,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 240 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-11-19 08:32:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-19 08:32:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2022-11-19 08:32:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-11-19 08:32:57,186 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 17 [2022-11-19 08:32:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:57,186 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-11-19 08:32:57,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-11-19 08:32:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:32:57,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:57,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 08:32:57,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:57,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 08:32:57,394 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:32:57,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:57,394 INFO L85 PathProgramCache]: Analyzing trace with hash 329663255, now seen corresponding path program 2 times [2022-11-19 08:32:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:57,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052214360] [2022-11-19 08:32:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:58,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:58,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052214360] [2022-11-19 08:32:58,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052214360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:32:58,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872593824] [2022-11-19 08:32:58,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:32:58,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:58,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:58,120 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:58,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:32:58,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:32:58,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:58,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 08:32:58,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:58,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-19 08:32:58,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:32:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:58,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:59,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872593824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219647273] [2022-11-19 08:32:59,467 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:32:59,467 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:59,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:59,468 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:59,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:59,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:59,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:32:59,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:32:59,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:59,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:32:59,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:59,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:59,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:59,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:59,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:59,717 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:32:59,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:32:59,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:00,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:00,199 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:33:02,369 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2692#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:33:02,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:33:02,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:33:02,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2022-11-19 08:33:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590000711] [2022-11-19 08:33:02,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:02,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 08:33:02,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:02,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 08:33:02,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 08:33:02,372 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:04,206 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-11-19 08:33:04,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:33:04,206 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 08:33:04,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:04,207 INFO L225 Difference]: With dead ends: 81 [2022-11-19 08:33:04,207 INFO L226 Difference]: Without dead ends: 81 [2022-11-19 08:33:04,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=449, Invalid=2857, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 08:33:04,209 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 455 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:04,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 107 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:33:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-19 08:33:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2022-11-19 08:33:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-19 08:33:04,214 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 18 [2022-11-19 08:33:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:04,214 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-19 08:33:04,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-19 08:33:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:33:04,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:04,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:04,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:04,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 08:33:04,419 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:33:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:04,419 INFO L85 PathProgramCache]: Analyzing trace with hash -205748302, now seen corresponding path program 1 times [2022-11-19 08:33:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:04,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509979761] [2022-11-19 08:33:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:04,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:05,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:05,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509979761] [2022-11-19 08:33:05,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509979761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:33:05,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81053006] [2022-11-19 08:33:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:05,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:05,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:05,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:05,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:33:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:05,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-19 08:33:05,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:05,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:33:05,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:33:05,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-19 08:33:05,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-19 08:33:05,851 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-19 08:33:05,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2022-11-19 08:33:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:05,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:06,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:33:06,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-19 08:33:06,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-19 08:33:06,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 08:33:06,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-19 08:33:06,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:33:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:06,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81053006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:06,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009925511] [2022-11-19 08:33:06,740 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 08:33:06,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:33:06,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:33:06,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:33:06,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:33:06,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:06,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:33:06,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:33:06,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:06,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:33:06,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:06,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:33:06,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:06,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:33:06,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:06,963 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:33:06,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:33:07,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:07,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:07,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:07,426 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:33:11,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3020#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:33:11,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:33:11,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:33:11,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-11-19 08:33:11,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830608899] [2022-11-19 08:33:11,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:11,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 08:33:11,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:11,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 08:33:11,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2048, Unknown=7, NotChecked=0, Total=2256 [2022-11-19 08:33:11,446 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:11,993 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-11-19 08:33:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:33:11,993 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 08:33:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:11,994 INFO L225 Difference]: With dead ends: 72 [2022-11-19 08:33:11,994 INFO L226 Difference]: Without dead ends: 72 [2022-11-19 08:33:11,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=251, Invalid=2604, Unknown=7, NotChecked=0, Total=2862 [2022-11-19 08:33:11,996 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:11,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 195 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 183 Unchecked, 0.1s Time] [2022-11-19 08:33:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-19 08:33:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2022-11-19 08:33:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-11-19 08:33:11,999 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 19 [2022-11-19 08:33:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:11,999 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-11-19 08:33:12,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-11-19 08:33:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:33:12,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:12,000 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:12,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:12,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:12,207 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:33:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1631322325, now seen corresponding path program 2 times [2022-11-19 08:33:12,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:12,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844690787] [2022-11-19 08:33:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:12,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:12,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:12,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844690787] [2022-11-19 08:33:12,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844690787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:33:12,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568399905] [2022-11-19 08:33:12,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:33:12,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:12,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:12,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:12,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:33:13,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:33:13,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:33:13,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 08:33:13,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:13,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:33:13,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:33:13,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-19 08:33:13,663 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-19 08:33:13,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2022-11-19 08:33:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:13,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:18,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:33:18,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-19 08:33:18,399 INFO L321 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-11-19 08:33:18,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 39 [2022-11-19 08:33:18,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:33:18,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 47 [2022-11-19 08:33:18,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:18,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:33:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:18,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568399905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:18,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679687801] [2022-11-19 08:33:18,614 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:33:18,614 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:33:18,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:33:18,615 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:33:18,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:33:18,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:18,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:33:18,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:33:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:18,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:33:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:18,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:33:18,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:18,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:33:18,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:18,845 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:33:18,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:33:18,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:19,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:19,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:19,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:33:23,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3333#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:33:23,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:33:23,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:33:23,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-19 08:33:23,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629381767] [2022-11-19 08:33:23,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:23,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 08:33:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 08:33:23,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1723, Unknown=5, NotChecked=0, Total=1892 [2022-11-19 08:33:23,025 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:23,981 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-11-19 08:33:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:33:23,984 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2022-11-19 08:33:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:23,984 INFO L225 Difference]: With dead ends: 67 [2022-11-19 08:33:23,984 INFO L226 Difference]: Without dead ends: 67 [2022-11-19 08:33:23,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=250, Invalid=2607, Unknown=5, NotChecked=0, Total=2862 [2022-11-19 08:33:23,986 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:23,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 246 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 114 Unchecked, 0.1s Time] [2022-11-19 08:33:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-19 08:33:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2022-11-19 08:33:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-19 08:33:23,988 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 21 [2022-11-19 08:33:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:23,989 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-19 08:33:23,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-19 08:33:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:33:23,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:23,990 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:23,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:24,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:24,190 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:33:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:24,191 INFO L85 PathProgramCache]: Analyzing trace with hash -529317857, now seen corresponding path program 2 times [2022-11-19 08:33:24,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:24,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919833049] [2022-11-19 08:33:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:24,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:25,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:25,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919833049] [2022-11-19 08:33:25,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919833049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:33:25,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77798051] [2022-11-19 08:33:25,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:33:25,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:25,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:25,602 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:25,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:33:25,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:33:25,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:33:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-19 08:33:25,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:25,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:33:25,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-19 08:33:25,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-19 08:33:26,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-19 08:33:26,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-11-19 08:33:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:27,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:33:27,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 25 [2022-11-19 08:33:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:27,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:29,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:33:29,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 83 [2022-11-19 08:33:29,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 92 [2022-11-19 08:33:29,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:33:29,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 139 [2022-11-19 08:33:29,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 81 [2022-11-19 08:33:29,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 77 [2022-11-19 08:33:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:29,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77798051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:29,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763720935] [2022-11-19 08:33:29,449 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 08:33:29,449 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:33:29,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:33:29,450 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:33:29,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:33:29,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:29,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:33:29,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:33:29,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:29,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:33:29,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:29,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:33:29,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:29,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:33:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:29,690 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:33:29,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:33:29,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:29,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:30,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:33:30,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:33:34,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3660#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:33:34,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:33:34,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:33:34,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 39 [2022-11-19 08:33:34,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950234267] [2022-11-19 08:33:34,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:34,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-19 08:33:34,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:34,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-19 08:33:34,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2674, Unknown=7, NotChecked=0, Total=2970 [2022-11-19 08:33:34,614 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 41 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:48,532 WARN L233 SmtUtils]: Spent 12.26s on a formula simplification. DAG size of input: 53 DAG size of output: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:55,017 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 61 DAG size of output: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:57,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:57,024 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-11-19 08:33:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 08:33:57,024 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 08:33:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:57,024 INFO L225 Difference]: With dead ends: 82 [2022-11-19 08:33:57,025 INFO L226 Difference]: Without dead ends: 43 [2022-11-19 08:33:57,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=634, Invalid=5812, Unknown=34, NotChecked=0, Total=6480 [2022-11-19 08:33:57,027 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:57,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 188 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-11-19 08:33:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-19 08:33:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-19 08:33:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-11-19 08:33:57,029 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 22 [2022-11-19 08:33:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:57,029 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-11-19 08:33:57,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-11-19 08:33:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:33:57,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:57,030 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-19 08:33:57,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-19 08:33:57,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 08:33:57,235 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:33:57,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:57,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2113270104, now seen corresponding path program 3 times [2022-11-19 08:33:57,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:57,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360534688] [2022-11-19 08:33:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:57,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:58,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:58,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360534688] [2022-11-19 08:33:58,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360534688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:33:58,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551217420] [2022-11-19 08:33:58,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:33:58,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:58,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:58,110 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:58,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:33:58,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:33:58,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:33:58,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-19 08:33:58,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:58,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:33:58,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-19 08:33:58,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:33:58,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-19 08:33:58,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-19 08:33:59,199 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2022-11-19 08:33:59,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2022-11-19 08:33:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:59,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:08,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:34:08,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 46 [2022-11-19 08:34:08,945 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-19 08:34:08,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-19 08:34:08,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:08,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:34:08,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 94 [2022-11-19 08:34:09,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:09,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-19 08:34:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:09,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551217420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400229843] [2022-11-19 08:34:09,588 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:34:09,588 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:09,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:09,589 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:09,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:09,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:09,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:34:09,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:34:09,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:09,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:34:09,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:09,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:09,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:09,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:09,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:09,859 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:34:09,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:34:09,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:10,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:10,237 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:12,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4020#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:12,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:12,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:12,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2022-11-19 08:34:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031768573] [2022-11-19 08:34:12,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:12,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 08:34:12,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 08:34:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2347, Unknown=15, NotChecked=0, Total=2550 [2022-11-19 08:34:12,831 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 42 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:15,442 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2022-11-19 08:34:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 08:34:15,443 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 08:34:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:15,444 INFO L225 Difference]: With dead ends: 51 [2022-11-19 08:34:15,444 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 08:34:15,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=348, Invalid=4053, Unknown=21, NotChecked=0, Total=4422 [2022-11-19 08:34:15,446 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:15,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 225 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-19 08:34:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 08:34:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-11-19 08:34:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-19 08:34:15,448 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 22 [2022-11-19 08:34:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:15,448 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-19 08:34:15,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-19 08:34:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:34:15,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:15,449 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:15,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:15,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 08:34:15,655 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:34:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash 959683711, now seen corresponding path program 3 times [2022-11-19 08:34:15,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:15,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101244191] [2022-11-19 08:34:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:15,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:16,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:16,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101244191] [2022-11-19 08:34:16,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101244191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:16,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057529104] [2022-11-19 08:34:16,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:34:16,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:16,455 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:16,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:34:16,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:34:16,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:16,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-19 08:34:16,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:16,623 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:16,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 08:34:16,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:34:16,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:34:16,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-19 08:34:17,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-19 08:34:17,616 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-19 08:34:17,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 31 [2022-11-19 08:34:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:17,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:18,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:34:18,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 48 [2022-11-19 08:34:18,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2022-11-19 08:34:18,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 46 [2022-11-19 08:34:18,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 08:34:18,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 08:34:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:19,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057529104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:19,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754311996] [2022-11-19 08:34:19,080 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:34:19,081 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:19,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:19,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:19,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:19,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:19,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:34:19,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:34:19,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:19,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:34:19,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:19,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:19,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:19,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:19,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:19,271 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:34:19,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:34:19,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:19,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:19,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:19,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:23,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4355#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:23,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:23,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:23,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2022-11-19 08:34:23,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780918235] [2022-11-19 08:34:23,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:23,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 08:34:23,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:23,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 08:34:23,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2743, Unknown=6, NotChecked=0, Total=2970 [2022-11-19 08:34:23,876 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 42 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:29,618 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-11-19 08:34:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:34:29,619 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 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 26 [2022-11-19 08:34:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:29,619 INFO L225 Difference]: With dead ends: 57 [2022-11-19 08:34:29,619 INFO L226 Difference]: Without dead ends: 57 [2022-11-19 08:34:29,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=356, Invalid=4328, Unknown=8, NotChecked=0, Total=4692 [2022-11-19 08:34:29,621 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:29,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 218 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 176 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2022-11-19 08:34:29,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-19 08:34:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-11-19 08:34:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-11-19 08:34:29,624 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 26 [2022-11-19 08:34:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:29,624 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-11-19 08:34:29,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-11-19 08:34:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:34:29,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:29,627 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-19 08:34:29,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:29,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:29,832 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:34:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2083872407, now seen corresponding path program 3 times [2022-11-19 08:34:29,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:29,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896446578] [2022-11-19 08:34:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:29,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:30,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896446578] [2022-11-19 08:34:30,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896446578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263505245] [2022-11-19 08:34:30,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:34:30,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:30,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:30,966 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:30,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:34:31,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:34:31,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:31,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-19 08:34:31,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:31,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:31,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-19 08:34:31,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:32,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:33,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263505245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1083638954] [2022-11-19 08:34:33,350 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:34:33,350 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:33,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:33,351 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:33,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:33,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:33,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:34:33,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:34:33,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:33,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:34:33,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:33,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:33,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:33,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:33,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:33,543 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:34:33,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:34:33,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:33,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:33,876 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:36,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4714#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:36,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:36,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:36,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 40 [2022-11-19 08:34:36,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618028391] [2022-11-19 08:34:36,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:36,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 08:34:36,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 08:34:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 08:34:36,441 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:42,724 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-11-19 08:34:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-19 08:34:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 08:34:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:42,725 INFO L225 Difference]: With dead ends: 88 [2022-11-19 08:34:42,726 INFO L226 Difference]: Without dead ends: 88 [2022-11-19 08:34:42,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=745, Invalid=5897, Unknown=0, NotChecked=0, Total=6642 [2022-11-19 08:34:42,727 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 287 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:42,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 210 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 08:34:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-19 08:34:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2022-11-19 08:34:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-19 08:34:42,730 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 28 [2022-11-19 08:34:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:42,730 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-19 08:34:42,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:42,731 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-19 08:34:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:34:42,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:42,731 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:42,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-19 08:34:42,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:42,934 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:34:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1659839438, now seen corresponding path program 3 times [2022-11-19 08:34:42,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:42,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356359271] [2022-11-19 08:34:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:42,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:45,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:45,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356359271] [2022-11-19 08:34:45,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356359271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:45,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464815284] [2022-11-19 08:34:45,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:34:45,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:45,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:45,965 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:45,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:34:46,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:34:46,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:46,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-19 08:34:46,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:46,117 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:46,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 08:34:46,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:46,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:34:46,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:34:47,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-19 08:34:47,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-19 08:34:48,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:48,022 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-19 08:34:48,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 55 [2022-11-19 08:34:48,384 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-19 08:34:48,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 42 [2022-11-19 08:34:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:48,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:49,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:34:49,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:51,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:34:51,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 60 [2022-11-19 08:34:51,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 80 [2022-11-19 08:34:51,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:34:51,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-19 08:34:51,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 63 [2022-11-19 08:34:51,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 08:34:51,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 08:34:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:51,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464815284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:51,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057077798] [2022-11-19 08:34:51,508 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 08:34:51,508 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:51,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:51,509 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:51,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:51,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:51,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:34:51,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:34:51,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:51,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:34:51,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:51,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:51,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:51,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:51,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:51,706 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:34:51,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:34:51,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:51,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:52,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:52,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:57,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5150#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:57,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:57,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:57,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 60 [2022-11-19 08:34:57,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140194433] [2022-11-19 08:34:57,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:57,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-19 08:34:57,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-19 08:34:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=5317, Unknown=29, NotChecked=0, Total=5700 [2022-11-19 08:34:57,846 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 62 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:03,032 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-11-19 08:35:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 08:35:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 states have internal predecessors, (87), 0 states have call successors, (0), 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 [2022-11-19 08:35:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:03,034 INFO L225 Difference]: With dead ends: 73 [2022-11-19 08:35:03,034 INFO L226 Difference]: Without dead ends: 57 [2022-11-19 08:35:03,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=773, Invalid=9886, Unknown=53, NotChecked=0, Total=10712 [2022-11-19 08:35:03,036 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:03,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 85 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-11-19 08:35:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-19 08:35:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-11-19 08:35:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-11-19 08:35:03,038 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 29 [2022-11-19 08:35:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:03,038 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-11-19 08:35:03,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-11-19 08:35:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:35:03,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:03,039 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-19 08:35:03,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:03,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-19 08:35:03,242 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:35:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1902155224, now seen corresponding path program 4 times [2022-11-19 08:35:03,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:03,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279792017] [2022-11-19 08:35:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:03,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:04,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:04,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279792017] [2022-11-19 08:35:04,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279792017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:35:04,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108314799] [2022-11-19 08:35:04,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:35:04,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:04,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:04,569 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:04,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:35:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:04,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-19 08:35:04,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:04,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:35:04,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:35:04,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-19 08:35:08,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-19 08:35:22,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-19 08:35:29,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2022-11-19 08:35:29,860 INFO L321 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2022-11-19 08:35:29,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 47 [2022-11-19 08:35:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 44 refuted. 17 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:29,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:33,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:35:33,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 72 [2022-11-19 08:35:33,109 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-19 08:35:33,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-19 08:35:33,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:33,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:35:33,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 116 [2022-11-19 08:35:33,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:35:33,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:35:33,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:35:33,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:35:33,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:35:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:33,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108314799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:33,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963336959] [2022-11-19 08:35:33,368 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:35:33,368 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:35:33,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:35:33,369 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:35:33,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:35:33,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:35:33,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:35:33,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:35:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:33,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,565 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:35:33,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:35:33,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:35:33,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:35:33,921 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:35:37,155 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5596#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.offset|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:35:37,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:35:37,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:35:37,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 60 [2022-11-19 08:35:37,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432681836] [2022-11-19 08:35:37,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:37,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-19 08:35:37,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-19 08:35:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=4603, Unknown=50, NotChecked=0, Total=4970 [2022-11-19 08:35:37,158 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 62 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 61 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:55,719 WARN L233 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 70 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:04,874 WARN L233 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 66 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:11,827 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 58 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:21,836 WARN L233 SmtUtils]: Spent 9.86s on a formula simplification. DAG size of input: 76 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:38,402 WARN L233 SmtUtils]: Spent 15.01s on a formula simplification. DAG size of input: 82 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:50,926 WARN L233 SmtUtils]: Spent 12.36s on a formula simplification. DAG size of input: 79 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:04,595 WARN L233 SmtUtils]: Spent 11.54s on a formula simplification. DAG size of input: 71 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:11,175 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 79 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:21,354 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 82 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:28,641 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 80 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:40,928 WARN L233 SmtUtils]: Spent 11.01s on a formula simplification. DAG size of input: 68 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:46,956 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 82 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:47,003 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-11-19 08:37:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 08:37:47,003 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 61 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 32 [2022-11-19 08:37:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:47,004 INFO L225 Difference]: With dead ends: 53 [2022-11-19 08:37:47,004 INFO L226 Difference]: Without dead ends: 53 [2022-11-19 08:37:47,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 160.8s TimeCoverageRelationStatistics Valid=655, Invalid=8030, Unknown=57, NotChecked=0, Total=8742 [2022-11-19 08:37:47,005 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:47,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 337 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-11-19 08:37:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-19 08:37:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-19 08:37:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:47,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-11-19 08:37:47,007 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 32 [2022-11-19 08:37:47,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:47,008 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-11-19 08:37:47,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 61 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-11-19 08:37:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:37:47,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:47,009 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:47,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-19 08:37:47,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:37:47,214 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:37:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash -55625729, now seen corresponding path program 4 times [2022-11-19 08:37:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:37:47,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212666475] [2022-11-19 08:37:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:47,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:37:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:48,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:37:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212666475] [2022-11-19 08:37:48,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212666475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:37:48,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28853991] [2022-11-19 08:37:48,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:37:48,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:37:48,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:37:48,716 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:37:48,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:37:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:48,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-19 08:37:48,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:48,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:37:48,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:37:49,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-19 08:37:49,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-19 08:37:50,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-19 08:37:50,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2022-11-19 08:37:51,202 INFO L321 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2022-11-19 08:37:51,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 47 [2022-11-19 08:37:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:51,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:54,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:37:54,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 72 [2022-11-19 08:37:54,801 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-19 08:37:54,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-19 08:37:54,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:37:54,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:37:54,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 116 [2022-11-19 08:37:54,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 08:37:54,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 08:37:54,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 08:37:54,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:37:54,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-19 08:37:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:55,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28853991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:55,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746566940] [2022-11-19 08:37:55,033 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:37:55,034 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:37:55,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:37:55,034 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:37:55,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:37:55,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:55,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:37:55,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:37:55,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:55,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:37:55,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:55,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:37:55,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:55,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:37:55,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:55,229 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:37:55,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:37:55,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:37:55,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:37:55,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:37:55,604 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:38:00,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6036#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:38:00,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:38:00,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:38:00,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 62 [2022-11-19 08:38:00,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545543080] [2022-11-19 08:38:00,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:38:00,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-19 08:38:00,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:00,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-19 08:38:00,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=5464, Unknown=37, NotChecked=0, Total=5852 [2022-11-19 08:38:00,862 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 64 states, 63 states have (on average 1.7142857142857142) internal successors, (108), 63 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:12,237 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 129 DAG size of output: 117 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:25,493 WARN L233 SmtUtils]: Spent 13.07s on a formula simplification. DAG size of input: 124 DAG size of output: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:32,147 WARN L233 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 103 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:40,885 WARN L233 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 102 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:47,381 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 104 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:49,802 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2022-11-19 08:38:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 08:38:49,803 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.7142857142857142) internal successors, (108), 63 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-19 08:38:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:49,804 INFO L225 Difference]: With dead ends: 78 [2022-11-19 08:38:49,804 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 08:38:49,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=809, Invalid=10689, Unknown=58, NotChecked=0, Total=11556 [2022-11-19 08:38:49,806 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:49,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 430 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2022-11-19 08:38:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 08:38:49,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-11-19 08:38:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-11-19 08:38:49,808 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 36 [2022-11-19 08:38:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:49,808 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-11-19 08:38:49,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.7142857142857142) internal successors, (108), 63 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:49,809 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-11-19 08:38:49,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 08:38:49,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:49,809 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:38:49,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:50,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-19 08:38:50,015 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:38:50,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:50,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1589814578, now seen corresponding path program 4 times [2022-11-19 08:38:50,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:50,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779964586] [2022-11-19 08:38:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:50,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:56,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:56,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779964586] [2022-11-19 08:38:56,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779964586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:38:56,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510476654] [2022-11-19 08:38:56,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:38:56,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:56,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:56,462 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:56,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:38:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:56,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 162 conjunts are in the unsatisfiable core [2022-11-19 08:38:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:56,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:38:56,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:38:57,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-19 08:38:58,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-19 08:38:58,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-19 08:38:59,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2022-11-19 08:39:00,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2022-11-19 08:39:02,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2022-11-19 08:39:03,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 74 [2022-11-19 08:39:04,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 75 [2022-11-19 08:39:05,343 INFO L321 Elim1Store]: treesize reduction 28, result has 68.2 percent of original size [2022-11-19 08:39:05,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 90 treesize of output 94 [2022-11-19 08:39:05,351 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-19 08:39:05,379 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-19 08:39:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:39:05,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:40:01,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:40:01,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 175 treesize of output 108 [2022-11-19 08:40:01,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 172 [2022-11-19 08:40:01,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 195 [2022-11-19 08:40:01,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:40:01,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:40:01,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:40:01,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:40:01,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:40:01,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:40:01,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:40:01,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:40:02,065 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-19 08:40:02,083 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-19 08:40:02,113 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-19 08:40:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:40:02,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510476654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:40:02,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1544647760] [2022-11-19 08:40:02,529 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 08:40:02,529 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:40:02,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:40:02,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:40:02,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:40:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:40:02,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 08:40:02,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 08:40:02,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:40:02,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:40:02,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:40:02,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:40:02,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:40:02,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:40:02,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:40:02,771 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:40:02,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 08:40:02,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:40:03,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:40:03,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:40:03,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:40:14,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6658#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrlcpy_~d~0#1.base|)) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (< (select |#length| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (<= 1 |ULTIMATE.start_main_~n~1#1|) (<= |ULTIMATE.start_cstrlcpy_#in~siz#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlcpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 1 |ULTIMATE.start_cstrlcpy_#in~siz#1|) (<= |ULTIMATE.start_cstrlcpy_~n~0#1| 2147483646) (<= |ULTIMATE.start_cstrlcpy_~dst#1.offset| 0) (= (mod |ULTIMATE.start_cstrlcpy_~n~0#1| 18446744073709551616) 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_cstrlcpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post6#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) 0) (<= |ULTIMATE.start_cstrlcpy_~siz#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrlcpy_#in~dst#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlcpy_#in~src#1.base|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrlcpy_~d~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrlcpy_~src#1.base|) (= (+ |ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 0 |ULTIMATE.start_cstrlcpy_~dst#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-19 08:40:14,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:40:14,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:40:14,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 107 [2022-11-19 08:40:14,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21458144] [2022-11-19 08:40:14,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:40:14,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-11-19 08:40:14,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:40:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-11-19 08:40:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=14123, Unknown=181, NotChecked=0, Total=15006 [2022-11-19 08:40:14,351 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 109 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 108 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:41:17,405 WARN L233 SmtUtils]: Spent 35.73s on a formula simplification. DAG size of input: 194 DAG size of output: 184 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:43:54,414 WARN L233 SmtUtils]: Spent 2.16m on a formula simplification. DAG size of input: 189 DAG size of output: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:43:56,412 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (+ 6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse5 (+ 7 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse3 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse2 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (.cse1 (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (.cse8 (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse7 (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse4 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (and (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (and (<= .cse2 .cse3) (<= 0 .cse4))) (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (and (<= .cse4 .cse3) (<= 0 .cse0))) (or (forall ((v_ArrVal_756 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_756) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (and (<= 0 .cse5) (<= (+ 8 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse3)) (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse6) 0)) (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) (forall ((v_ArrVal_757 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_757) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0)) .cse1 (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse7) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse8) 0))) (or (and (<= .cse8 .cse3) (<= 0 .cse7)) (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0))) (or (and (<= .cse6 .cse3) (<= 0 .cse8)) (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse7) 0)) (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0)) .cse1 (forall ((v_ArrVal_757 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_757) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0))) (or (and (<= .cse7 .cse3) (<= 0 .cse2)) .cse1 (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0)))) (or (and (<= 0 .cse6) (<= .cse5 .cse3)) (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_756 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_756) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse8) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse7) 0)) (forall ((v_ArrVal_757 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_757) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0))))) is different from false [2022-11-19 08:44:54,348 WARN L233 SmtUtils]: Spent 45.86s on a formula simplification. DAG size of input: 155 DAG size of output: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:46:08,490 WARN L233 SmtUtils]: Spent 1.05m on a formula simplification. DAG size of input: 152 DAG size of output: 144 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:46:15,653 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (+ 6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse3 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse2 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (.cse1 (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (.cse5 (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse6 (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse4 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (and (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (and (<= .cse2 .cse3) (<= 0 .cse4))) (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (and (<= .cse4 .cse3) (<= 0 .cse0))) (or (and (<= .cse5 .cse3) (<= 0 .cse6)) (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0))) (or (and (<= .cse7 .cse3) (<= 0 .cse5)) (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse6) 0)) (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0)) .cse1 (forall ((v_ArrVal_757 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_757) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0))) (or (and (<= .cse6 .cse3) (<= 0 .cse2)) .cse1 (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0)))) (or (and (<= 0 .cse7) (<= (+ 7 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse3)) (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_756 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_756) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse5) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse6) 0)) (forall ((v_ArrVal_757 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_757) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0))))) is different from false [2022-11-19 08:46:28,772 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse6 (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse3 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse2 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse1 (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (.cse4 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1))) (and (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (and (<= .cse2 .cse3) (<= 0 .cse4))) (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (and (<= .cse4 .cse3) (<= 0 .cse0))) (or (and (<= .cse5 .cse3) (<= 0 .cse6)) (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0))) (or (and (<= (+ 6 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse3) (<= 0 .cse5)) (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse6) 0)) (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0)) .cse1 (forall ((v_ArrVal_757 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_757) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0))) (or (and (<= .cse6 .cse3) (<= 0 .cse2)) .cse1 (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0)))))) is different from false [2022-11-19 08:46:37,547 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse3 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse2 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse1 (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (.cse4 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1))) (and (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (and (<= .cse2 .cse3) (<= 0 .cse4))) (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (and (<= .cse4 .cse3) (<= 0 .cse0))) (or (and (<= (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse3) (<= 0 .cse5)) (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (forall ((v_ArrVal_759 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse2) 0))) (or (and (<= .cse5 .cse3) (<= 0 .cse2)) .cse1 (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0)))))) is different from false [2022-11-19 08:46:43,129 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse2 (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse1 (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (.cse4 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1))) (and (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) .cse1 (and (<= .cse2 .cse3) (<= 0 .cse4))) (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (and (<= .cse4 .cse3) (<= 0 .cse0))) (or (and (<= (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse3) (<= 0 .cse2)) .cse1 (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse4) 0)) (forall ((v_ArrVal_759 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_759) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0)))))) is different from false [2022-11-19 08:46:53,808 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) (.cse1 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1))) (and (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) .cse0) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0) (and (<= (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse1) (<= 0 .cse2))) (or (forall ((v_ArrVal_761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_761) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (and (<= .cse2 .cse1) (<= 0 .cse0))))) is different from false [2022-11-19 08:46:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:46:53,870 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-11-19 08:46:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-19 08:46:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 108 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-19 08:46:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:46:53,872 INFO L225 Difference]: With dead ends: 112 [2022-11-19 08:46:53,872 INFO L226 Difference]: Without dead ends: 96 [2022-11-19 08:46:53,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 185 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 6496 ImplicationChecksByTransitivity, 475.4s TimeCoverageRelationStatistics Valid=2025, Invalid=30088, Unknown=491, NotChecked=2178, Total=34782 [2022-11-19 08:46:53,878 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:46:53,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 153 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 151 Unchecked, 0.4s Time] [2022-11-19 08:46:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-19 08:46:53,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2022-11-19 08:46:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 92 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:46:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2022-11-19 08:46:53,881 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 49 [2022-11-19 08:46:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:46:53,882 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2022-11-19 08:46:53,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 108 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:46:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2022-11-19 08:46:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 08:46:53,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:46:53,883 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:46:53,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:46:54,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3914b224-26c6-4b3f-88d8-1b9efacd78b5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-19 08:46:54,090 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:46:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:46:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash -300331265, now seen corresponding path program 5 times [2022-11-19 08:46:54,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:46:54,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686572946] [2022-11-19 08:46:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:46:54,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:46:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat