./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 b5237d83 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_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/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_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba --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-b5237d8 [2022-11-22 01:16:57,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:16:57,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:16:57,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:16:57,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:16:57,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:16:57,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:16:57,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:16:57,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:16:57,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:16:57,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:16:57,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:16:57,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:16:57,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:16:57,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:16:57,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:16:57,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:16:57,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:16:57,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:16:57,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:16:57,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:16:57,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:16:57,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:16:57,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:16:57,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:16:57,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:16:57,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:16:57,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:16:57,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:16:57,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:16:57,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:16:57,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:16:57,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:16:57,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:16:57,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:16:57,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:16:57,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:16:57,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:16:57,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:16:57,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:16:57,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:16:57,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-22 01:16:57,281 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:16:57,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:16:57,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:16:57,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:16:57,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:16:57,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:16:57,283 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:16:57,283 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:16:57,283 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:16:57,284 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:16:57,284 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:16:57,284 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:16:57,284 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:16:57,284 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:16:57,285 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:16:57,285 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:16:57,285 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:16:57,285 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:16:57,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:16:57,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:16:57,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:16:57,287 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:16:57,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:16:57,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:16:57,287 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:16:57,288 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:16:57,288 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:16:57,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:16:57,288 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:16:57,289 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:16:57,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:16:57,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:16:57,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:16:57,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:16:57,290 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:16:57,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:16:57,290 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:16:57,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:16:57,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:16:57,291 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_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1ad2d5826e88851ec05294e79547a11a54665f4a2cf6f0e66f9eabed656148f [2022-11-22 01:16:57,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:16:57,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:16:57,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:16:57,632 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:16:57,632 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:16:57,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i [2022-11-22 01:17:00,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:17:00,952 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:17:00,953 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrlcpy-alloca-2.i [2022-11-22 01:17:00,966 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/data/b58e780be/aeb97f6714344579a259857b11d328c5/FLAGc6855dcf2 [2022-11-22 01:17:00,985 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/data/b58e780be/aeb97f6714344579a259857b11d328c5 [2022-11-22 01:17:00,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:17:00,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:17:00,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:17:00,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:17:00,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:17:01,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:17:00" (1/1) ... [2022-11-22 01:17:01,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b6ef16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01, skipping insertion in model container [2022-11-22 01:17:01,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:17:00" (1/1) ... [2022-11-22 01:17:01,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:17:01,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:17:01,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:17:01,383 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:17:01,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:17:01,496 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:17:01,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01 WrapperNode [2022-11-22 01:17:01,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:17:01,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:17:01,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:17:01,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:17:01,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,573 INFO L138 Inliner]: procedures = 111, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2022-11-22 01:17:01,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:17:01,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:17:01,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:17:01,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:17:01,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,599 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:17:01,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:17:01,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:17:01,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:17:01,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (1/1) ... [2022-11-22 01:17:01,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:17:01,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:01,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:17:01,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:17:01,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:17:01,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:17:01,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:17:01,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:17:01,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:17:01,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:17:01,814 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:17:01,817 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:17:02,130 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:17:02,210 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:17:02,210 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 01:17:02,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:17:02 BoogieIcfgContainer [2022-11-22 01:17:02,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:17:02,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:17:02,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:17:02,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:17:02,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:17:00" (1/3) ... [2022-11-22 01:17:02,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59964183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:17:02, skipping insertion in model container [2022-11-22 01:17:02,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:01" (2/3) ... [2022-11-22 01:17:02,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59964183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:17:02, skipping insertion in model container [2022-11-22 01:17:02,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:17:02" (3/3) ... [2022-11-22 01:17:02,224 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-2.i [2022-11-22 01:17:02,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:17:02,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-22 01:17:02,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:17:02,326 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;@4c391c98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:17:02,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-22 01:17:02,331 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) [2022-11-22 01:17:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:17:02,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:02,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:17:02,339 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)] === [2022-11-22 01:17:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:02,349 INFO L85 PathProgramCache]: Analyzing trace with hash 4016, now seen corresponding path program 1 times [2022-11-22 01:17:02,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:02,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808020521] [2022-11-22 01:17:02,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:02,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:02,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:02,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808020521] [2022-11-22 01:17:02,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808020521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:02,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:02,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:17:02,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889807688] [2022-11-22 01:17:02,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:02,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:17:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:02,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:17:02,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:17:02,956 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) [2022-11-22 01:17:03,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:03,041 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-11-22 01:17:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:17:03,044 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 [2022-11-22 01:17:03,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:03,055 INFO L225 Difference]: With dead ends: 30 [2022-11-22 01:17:03,055 INFO L226 Difference]: Without dead ends: 29 [2022-11-22 01:17:03,057 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 [2022-11-22 01:17:03,062 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:03,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:17:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-22 01:17:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-22 01:17:03,104 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) [2022-11-22 01:17:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-22 01:17:03,108 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 2 [2022-11-22 01:17:03,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:03,109 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-22 01:17:03,109 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) [2022-11-22 01:17:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-22 01:17:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:17:03,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:03,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:17:03,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:17:03,114 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)] === [2022-11-22 01:17:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash 4017, now seen corresponding path program 1 times [2022-11-22 01:17:03,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:03,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806202615] [2022-11-22 01:17:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:03,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:03,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806202615] [2022-11-22 01:17:03,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806202615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:03,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:03,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:17:03,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688234939] [2022-11-22 01:17:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:03,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:17:03,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:03,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:17:03,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:17:03,444 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) [2022-11-22 01:17:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:03,477 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-22 01:17:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:17:03,478 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 [2022-11-22 01:17:03,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:03,479 INFO L225 Difference]: With dead ends: 28 [2022-11-22 01:17:03,479 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 01:17:03,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:17:03,481 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 [2022-11-22 01:17:03,482 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] [2022-11-22 01:17:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 01:17:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-22 01:17:03,486 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) [2022-11-22 01:17:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-22 01:17:03,487 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 2 [2022-11-22 01:17:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:03,487 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-22 01:17:03,488 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) [2022-11-22 01:17:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-22 01:17:03,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:17:03,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:03,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:17:03,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:17:03,489 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)] === [2022-11-22 01:17:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 124485, now seen corresponding path program 1 times [2022-11-22 01:17:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:03,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745088468] [2022-11-22 01:17:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:03,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:03,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:03,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745088468] [2022-11-22 01:17:03,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745088468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:03,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:03,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:17:03,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048242517] [2022-11-22 01:17:03,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:03,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:17:03,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:03,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:17:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:17:03,540 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) [2022-11-22 01:17:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:03,570 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-22 01:17:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:17:03,571 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 [2022-11-22 01:17:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:03,572 INFO L225 Difference]: With dead ends: 27 [2022-11-22 01:17:03,572 INFO L226 Difference]: Without dead ends: 27 [2022-11-22 01:17:03,572 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 [2022-11-22 01:17:03,574 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 [2022-11-22 01:17:03,575 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] [2022-11-22 01:17:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-22 01:17:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-22 01:17:03,590 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) [2022-11-22 01:17:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-22 01:17:03,591 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 3 [2022-11-22 01:17:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:03,591 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-22 01:17:03,592 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) [2022-11-22 01:17:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-22 01:17:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:17:03,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:03,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:17:03,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:17:03,593 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)] === [2022-11-22 01:17:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:03,594 INFO L85 PathProgramCache]: Analyzing trace with hash 124486, now seen corresponding path program 1 times [2022-11-22 01:17:03,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:03,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534244824] [2022-11-22 01:17:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:03,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:03,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:03,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534244824] [2022-11-22 01:17:03,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534244824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:03,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:03,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:17:03,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862933134] [2022-11-22 01:17:03,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:03,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:17:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:03,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:17:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:17:03,803 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) [2022-11-22 01:17:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:03,833 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-22 01:17:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:17:03,834 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 [2022-11-22 01:17:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:03,835 INFO L225 Difference]: With dead ends: 26 [2022-11-22 01:17:03,835 INFO L226 Difference]: Without dead ends: 26 [2022-11-22 01:17:03,835 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 [2022-11-22 01:17:03,837 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 [2022-11-22 01:17:03,838 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] [2022-11-22 01:17:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-22 01:17:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-22 01:17:03,841 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) [2022-11-22 01:17:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-22 01:17:03,842 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 3 [2022-11-22 01:17:03,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:03,843 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-22 01:17:03,843 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) [2022-11-22 01:17:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-22 01:17:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:17:03,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:03,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:03,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:17:03,845 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)] === [2022-11-22 01:17:03,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash -932435257, now seen corresponding path program 1 times [2022-11-22 01:17:03,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:03,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715340826] [2022-11-22 01:17:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:03,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:03,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:03,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715340826] [2022-11-22 01:17:03,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715340826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:03,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:03,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:17:03,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293632440] [2022-11-22 01:17:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:03,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:17:03,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:17:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:17:03,884 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) [2022-11-22 01:17:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:03,909 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-22 01:17:03,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:17:03,909 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 [2022-11-22 01:17:03,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:03,910 INFO L225 Difference]: With dead ends: 30 [2022-11-22 01:17:03,911 INFO L226 Difference]: Without dead ends: 30 [2022-11-22 01:17:03,911 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 [2022-11-22 01:17:03,912 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 [2022-11-22 01:17:03,913 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] [2022-11-22 01:17:03,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-22 01:17:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-11-22 01:17:03,916 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) [2022-11-22 01:17:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-22 01:17:03,917 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 7 [2022-11-22 01:17:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:03,918 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-22 01:17:03,918 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) [2022-11-22 01:17:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-22 01:17:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:17:03,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:03,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:03,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:17:03,920 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)] === [2022-11-22 01:17:03,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:03,921 INFO L85 PathProgramCache]: Analyzing trace with hash -932461262, now seen corresponding path program 1 times [2022-11-22 01:17:03,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:03,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441721534] [2022-11-22 01:17:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:03,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:03,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:03,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441721534] [2022-11-22 01:17:03,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441721534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:03,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:03,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:17:03,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073935656] [2022-11-22 01:17:03,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:03,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:17:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:17:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:17:03,984 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) [2022-11-22 01:17:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:04,025 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-22 01:17:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:17:04,026 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 [2022-11-22 01:17:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:04,026 INFO L225 Difference]: With dead ends: 26 [2022-11-22 01:17:04,027 INFO L226 Difference]: Without dead ends: 26 [2022-11-22 01:17:04,027 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 [2022-11-22 01:17:04,028 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 [2022-11-22 01:17:04,029 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] [2022-11-22 01:17:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-22 01:17:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-22 01:17:04,032 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) [2022-11-22 01:17:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-22 01:17:04,033 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 7 [2022-11-22 01:17:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:04,033 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-22 01:17:04,033 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) [2022-11-22 01:17:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-22 01:17:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:17:04,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:04,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:04,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:17:04,035 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)] === [2022-11-22 01:17:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:04,036 INFO L85 PathProgramCache]: Analyzing trace with hash -932461261, now seen corresponding path program 1 times [2022-11-22 01:17:04,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:04,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070974199] [2022-11-22 01:17:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:04,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:04,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070974199] [2022-11-22 01:17:04,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070974199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:04,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:04,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:17:04,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071304640] [2022-11-22 01:17:04,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:04,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:17:04,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:17:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:17:04,155 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) [2022-11-22 01:17:04,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:04,267 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-22 01:17:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:17:04,268 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 [2022-11-22 01:17:04,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:04,269 INFO L225 Difference]: With dead ends: 39 [2022-11-22 01:17:04,269 INFO L226 Difference]: Without dead ends: 39 [2022-11-22 01:17:04,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:17:04,270 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:04,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 32 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:17:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-22 01:17:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2022-11-22 01:17:04,301 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) [2022-11-22 01:17:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-22 01:17:04,309 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 7 [2022-11-22 01:17:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:04,310 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-22 01:17:04,311 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) [2022-11-22 01:17:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-22 01:17:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:17:04,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:04,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:04,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:17:04,321 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)] === [2022-11-22 01:17:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash -933260589, now seen corresponding path program 1 times [2022-11-22 01:17:04,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:04,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343287989] [2022-11-22 01:17:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:04,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:04,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:04,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343287989] [2022-11-22 01:17:04,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343287989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:04,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:04,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:17:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705493512] [2022-11-22 01:17:04,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:04,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:17:04,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:17:04,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:17:04,475 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) [2022-11-22 01:17:04,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:04,535 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-11-22 01:17:04,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:17:04,536 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 [2022-11-22 01:17:04,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:04,540 INFO L225 Difference]: With dead ends: 30 [2022-11-22 01:17:04,541 INFO L226 Difference]: Without dead ends: 30 [2022-11-22 01:17:04,541 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 [2022-11-22 01:17:04,546 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 [2022-11-22 01:17:04,547 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] [2022-11-22 01:17:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-22 01:17:04,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-22 01:17:04,557 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) [2022-11-22 01:17:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-22 01:17:04,561 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 7 [2022-11-22 01:17:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:04,562 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-22 01:17:04,568 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) [2022-11-22 01:17:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-22 01:17:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:17:04,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:04,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:04,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:17:04,570 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)] === [2022-11-22 01:17:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash -933260588, now seen corresponding path program 1 times [2022-11-22 01:17:04,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:04,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589822] [2022-11-22 01:17:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:04,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:04,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589822] [2022-11-22 01:17:04,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:04,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:04,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:17:04,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169218630] [2022-11-22 01:17:04,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:04,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:17:04,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:17:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:17:04,837 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) [2022-11-22 01:17:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:04,925 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-22 01:17:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:17:04,926 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 [2022-11-22 01:17:04,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:04,928 INFO L225 Difference]: With dead ends: 35 [2022-11-22 01:17:04,928 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 01:17:04,930 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 [2022-11-22 01:17:04,932 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:04,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 45 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:17:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 01:17:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-11-22 01:17:04,948 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) [2022-11-22 01:17:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-22 01:17:04,950 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 7 [2022-11-22 01:17:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:04,950 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-22 01:17:04,950 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) [2022-11-22 01:17:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-22 01:17:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:17:04,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:04,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:04,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:17:04,952 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)] === [2022-11-22 01:17:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1158477073, now seen corresponding path program 1 times [2022-11-22 01:17:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:04,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275477344] [2022-11-22 01:17:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:04,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:05,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:05,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275477344] [2022-11-22 01:17:05,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275477344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:05,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:05,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:17:05,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616301227] [2022-11-22 01:17:05,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:05,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:17:05,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:05,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:17:05,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:17:05,049 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) [2022-11-22 01:17:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:05,101 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-11-22 01:17:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:17:05,102 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 [2022-11-22 01:17:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:05,103 INFO L225 Difference]: With dead ends: 30 [2022-11-22 01:17:05,103 INFO L226 Difference]: Without dead ends: 30 [2022-11-22 01:17:05,103 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 [2022-11-22 01:17:05,104 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 [2022-11-22 01:17:05,104 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] [2022-11-22 01:17:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-22 01:17:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-22 01:17:05,107 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) [2022-11-22 01:17:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-22 01:17:05,107 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 8 [2022-11-22 01:17:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:05,108 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-22 01:17:05,108 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) [2022-11-22 01:17:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-22 01:17:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:17:05,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:05,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:05,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:17:05,109 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)] === [2022-11-22 01:17:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1158477074, now seen corresponding path program 1 times [2022-11-22 01:17:05,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:05,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547372741] [2022-11-22 01:17:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:05,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:05,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:05,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547372741] [2022-11-22 01:17:05,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547372741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:05,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:05,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:17:05,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697477632] [2022-11-22 01:17:05,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:05,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:17:05,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:05,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:17:05,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:17:05,276 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) [2022-11-22 01:17:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:05,376 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-22 01:17:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:17:05,377 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 [2022-11-22 01:17:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:05,377 INFO L225 Difference]: With dead ends: 35 [2022-11-22 01:17:05,377 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 01:17:05,378 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 [2022-11-22 01:17:05,378 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 [2022-11-22 01:17:05,379 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] [2022-11-22 01:17:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 01:17:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-11-22 01:17:05,381 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) [2022-11-22 01:17:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-22 01:17:05,381 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 8 [2022-11-22 01:17:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:05,381 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-22 01:17:05,382 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) [2022-11-22 01:17:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-22 01:17:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:17:05,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:05,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:05,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:17:05,383 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)] === [2022-11-22 01:17:05,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:05,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1133692822, now seen corresponding path program 1 times [2022-11-22 01:17:05,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:05,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249232213] [2022-11-22 01:17:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:05,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:05,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:05,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249232213] [2022-11-22 01:17:05,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249232213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:05,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:05,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:17:05,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981595719] [2022-11-22 01:17:05,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:05,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:17:05,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:05,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:17:05,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:17:05,457 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) [2022-11-22 01:17:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:05,518 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-11-22 01:17:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:17:05,518 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 [2022-11-22 01:17:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:05,519 INFO L225 Difference]: With dead ends: 31 [2022-11-22 01:17:05,519 INFO L226 Difference]: Without dead ends: 31 [2022-11-22 01:17:05,519 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 [2022-11-22 01:17:05,520 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 [2022-11-22 01:17:05,521 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] [2022-11-22 01:17:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-22 01:17:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-22 01:17:05,523 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) [2022-11-22 01:17:05,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-22 01:17:05,523 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 8 [2022-11-22 01:17:05,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:05,524 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-22 01:17:05,524 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) [2022-11-22 01:17:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-22 01:17:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:17:05,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:05,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:05,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:17:05,526 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)] === [2022-11-22 01:17:05,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:05,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1133692823, now seen corresponding path program 1 times [2022-11-22 01:17:05,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:05,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888286892] [2022-11-22 01:17:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:05,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:05,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:05,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888286892] [2022-11-22 01:17:05,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888286892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:05,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:05,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:17:05,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929754555] [2022-11-22 01:17:05,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:05,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:17:05,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:05,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:17:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:17:05,658 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) [2022-11-22 01:17:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:05,742 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-11-22 01:17:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:17:05,743 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 [2022-11-22 01:17:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:05,744 INFO L225 Difference]: With dead ends: 40 [2022-11-22 01:17:05,744 INFO L226 Difference]: Without dead ends: 40 [2022-11-22 01:17:05,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:17:05,745 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 [2022-11-22 01:17:05,745 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] [2022-11-22 01:17:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-22 01:17:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-22 01:17:05,747 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) [2022-11-22 01:17:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-22 01:17:05,747 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 8 [2022-11-22 01:17:05,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:05,748 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-22 01:17:05,748 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) [2022-11-22 01:17:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-22 01:17:05,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:17:05,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:05,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:05,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:17:05,749 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)] === [2022-11-22 01:17:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:05,749 INFO L85 PathProgramCache]: Analyzing trace with hash 784724414, now seen corresponding path program 1 times [2022-11-22 01:17:05,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:05,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415613110] [2022-11-22 01:17:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:05,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:05,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:05,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415613110] [2022-11-22 01:17:05,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415613110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:05,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:05,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:17:05,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600984804] [2022-11-22 01:17:05,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:05,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:17:05,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:17:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:17:05,867 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) [2022-11-22 01:17:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:05,897 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-11-22 01:17:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:17:05,898 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 [2022-11-22 01:17:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:05,899 INFO L225 Difference]: With dead ends: 31 [2022-11-22 01:17:05,899 INFO L226 Difference]: Without dead ends: 29 [2022-11-22 01:17:05,899 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 [2022-11-22 01:17:05,900 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 [2022-11-22 01:17:05,900 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] [2022-11-22 01:17:05,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-22 01:17:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-22 01:17:05,902 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) [2022-11-22 01:17:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-22 01:17:05,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 9 [2022-11-22 01:17:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:05,903 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-22 01:17:05,904 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) [2022-11-22 01:17:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-22 01:17:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:17:05,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:05,905 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:05,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 01:17:05,905 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)] === [2022-11-22 01:17:05,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:05,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2128303807, now seen corresponding path program 1 times [2022-11-22 01:17:05,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:05,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877504836] [2022-11-22 01:17:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:05,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:17:06,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:06,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877504836] [2022-11-22 01:17:06,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877504836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:06,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:06,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:17:06,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45305114] [2022-11-22 01:17:06,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:06,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:17:06,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:06,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:17:06,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:17:06,100 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) [2022-11-22 01:17:06,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:06,168 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-22 01:17:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:17:06,169 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 [2022-11-22 01:17:06,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:06,169 INFO L225 Difference]: With dead ends: 28 [2022-11-22 01:17:06,170 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 01:17:06,171 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 [2022-11-22 01:17:06,173 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 [2022-11-22 01:17:06,174 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] [2022-11-22 01:17:06,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 01:17:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-22 01:17:06,176 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) [2022-11-22 01:17:06,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-22 01:17:06,176 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 11 [2022-11-22 01:17:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:06,177 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-22 01:17:06,177 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) [2022-11-22 01:17:06,177 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-22 01:17:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:17:06,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:06,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:06,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 01:17:06,180 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)] === [2022-11-22 01:17:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash 656395043, now seen corresponding path program 1 times [2022-11-22 01:17:06,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:06,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352204990] [2022-11-22 01:17:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:06,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:06,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:06,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352204990] [2022-11-22 01:17:06,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352204990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:06,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:06,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:17:06,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389529228] [2022-11-22 01:17:06,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:06,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:17:06,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:06,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:17:06,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:17:06,579 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) [2022-11-22 01:17:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:06,775 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-11-22 01:17:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:17:06,776 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 [2022-11-22 01:17:06,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:06,776 INFO L225 Difference]: With dead ends: 38 [2022-11-22 01:17:06,776 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 01:17:06,777 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 [2022-11-22 01:17:06,777 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 [2022-11-22 01:17:06,778 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] [2022-11-22 01:17:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 01:17:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-11-22 01:17:06,779 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) [2022-11-22 01:17:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-22 01:17:06,780 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 12 [2022-11-22 01:17:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:06,780 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-22 01:17:06,780 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) [2022-11-22 01:17:06,780 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-22 01:17:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:17:06,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:06,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:06,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 01:17:06,781 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)] === [2022-11-22 01:17:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:06,781 INFO L85 PathProgramCache]: Analyzing trace with hash 656429864, now seen corresponding path program 1 times [2022-11-22 01:17:06,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:06,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152181220] [2022-11-22 01:17:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:06,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:07,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:07,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152181220] [2022-11-22 01:17:07,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152181220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:07,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730554608] [2022-11-22 01:17:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:07,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:07,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:07,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:07,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:17:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:07,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-22 01:17:07,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:07,468 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 [2022-11-22 01:17:07,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:07,685 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 [2022-11-22 01:17:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:07,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:08,089 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 [2022-11-22 01:17:08,096 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 [2022-11-22 01:17:08,107 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 [2022-11-22 01:17:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:08,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730554608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:08,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1457020820] [2022-11-22 01:17:08,161 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:17:08,161 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:08,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:08,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:08,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:08,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,267 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 [2022-11-22 01:17:08,309 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 [2022-11-22 01:17:08,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,387 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 [2022-11-22 01:17:08,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:08,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:08,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,626 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:17:08,627 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 [2022-11-22 01:17:08,914 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 [2022-11-22 01:17:09,139 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 [2022-11-22 01:17:09,368 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:11,433 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 [2022-11-22 01:17:11,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:11,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:11,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-22 01:17:11,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065141220] [2022-11-22 01:17:11,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:11,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 01:17:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 01:17:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:17:11,435 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) [2022-11-22 01:17:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:12,082 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-22 01:17:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:17:12,082 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 [2022-11-22 01:17:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:12,083 INFO L225 Difference]: With dead ends: 42 [2022-11-22 01:17:12,083 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 01:17:12,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 01:17:12,084 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:12,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 113 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:17:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 01:17:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-11-22 01:17:12,086 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) [2022-11-22 01:17:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-11-22 01:17:12,087 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 12 [2022-11-22 01:17:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:12,087 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-11-22 01:17:12,087 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) [2022-11-22 01:17:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-11-22 01:17:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:17:12,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:12,088 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:12,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 01:17:12,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 01:17:12,298 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)] === [2022-11-22 01:17:12,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:12,299 INFO L85 PathProgramCache]: Analyzing trace with hash 75156022, now seen corresponding path program 1 times [2022-11-22 01:17:12,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:12,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276551054] [2022-11-22 01:17:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:12,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:17:12,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276551054] [2022-11-22 01:17:12,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276551054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:12,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:12,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:17:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121256454] [2022-11-22 01:17:12,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:12,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:17:12,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:17:12,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:17:12,392 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) [2022-11-22 01:17:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:12,413 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-22 01:17:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:17:12,414 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 [2022-11-22 01:17:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:12,414 INFO L225 Difference]: With dead ends: 35 [2022-11-22 01:17:12,414 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 01:17:12,415 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 [2022-11-22 01:17:12,415 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:12,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 47 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:17:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 01:17:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-22 01:17:12,417 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) [2022-11-22 01:17:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-22 01:17:12,418 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 13 [2022-11-22 01:17:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:12,418 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-22 01:17:12,419 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) [2022-11-22 01:17:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-22 01:17:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:17:12,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:12,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 01:17:12,420 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)] === [2022-11-22 01:17:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1125510717, now seen corresponding path program 1 times [2022-11-22 01:17:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:12,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662907321] [2022-11-22 01:17:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:12,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:12,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662907321] [2022-11-22 01:17:12,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662907321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:12,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728602721] [2022-11-22 01:17:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:12,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:12,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:12,767 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:12,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:17:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:12,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 01:17:12,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:13,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:13,327 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 5 treesize of output 3 [2022-11-22 01:17:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:13,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728602721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:13,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308813245] [2022-11-22 01:17:13,363 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:17:13,363 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:13,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:13,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:13,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:13,401 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 [2022-11-22 01:17:13,429 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 [2022-11-22 01:17:13,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:13,490 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 [2022-11-22 01:17:13,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:13,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:13,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:13,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:13,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:13,684 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:17:13,685 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 [2022-11-22 01:17:13,960 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 [2022-11-22 01:17:14,156 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 [2022-11-22 01:17:14,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:16,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1467#(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 [2022-11-22 01:17:16,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:16,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:16,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-22 01:17:16,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666635130] [2022-11-22 01:17:16,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:16,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:17:16,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:17:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:17:16,623 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) [2022-11-22 01:17:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:17,189 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-22 01:17:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:17:17,195 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 [2022-11-22 01:17:17,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:17,196 INFO L225 Difference]: With dead ends: 41 [2022-11-22 01:17:17,196 INFO L226 Difference]: Without dead ends: 41 [2022-11-22 01:17:17,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:17:17,197 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 139 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:17,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 104 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:17:17,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-22 01:17:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-11-22 01:17:17,201 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) [2022-11-22 01:17:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-22 01:17:17,202 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2022-11-22 01:17:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:17,202 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-22 01:17:17,202 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) [2022-11-22 01:17:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-22 01:17:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:17:17,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:17,203 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:17,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:17,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:17,410 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)] === [2022-11-22 01:17:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1928498822, now seen corresponding path program 1 times [2022-11-22 01:17:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:17,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652934843] [2022-11-22 01:17:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:17,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:17,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:17,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652934843] [2022-11-22 01:17:17,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652934843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:17,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685855334] [2022-11-22 01:17:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:17,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:17,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:17,899 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:17,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:17:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:17,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-22 01:17:18,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:18,008 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 [2022-11-22 01:17:18,048 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 [2022-11-22 01:17:18,179 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 [2022-11-22 01:17:18,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:18,294 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 [2022-11-22 01:17:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:18,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:18,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:18,735 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 [2022-11-22 01:17:18,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:18,746 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 [2022-11-22 01:17:18,753 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 [2022-11-22 01:17:18,775 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 [2022-11-22 01:17:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:18,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685855334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:18,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505011781] [2022-11-22 01:17:18,819 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 01:17:18,819 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:18,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:18,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:18,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:18,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:18,842 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 [2022-11-22 01:17:18,883 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 [2022-11-22 01:17:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:18,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-22 01:17:19,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:19,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:19,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:19,102 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 [2022-11-22 01:17:19,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:22,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1670#(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 [2022-11-22 01:17:22,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:22,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:22,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-11-22 01:17:22,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566772143] [2022-11-22 01:17:22,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:22,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 01:17:22,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 01:17:22,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=847, Unknown=1, NotChecked=0, Total=992 [2022-11-22 01:17:22,125 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) [2022-11-22 01:17:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:22,868 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-22 01:17:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:17:22,868 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 [2022-11-22 01:17:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:22,869 INFO L225 Difference]: With dead ends: 40 [2022-11-22 01:17:22,869 INFO L226 Difference]: Without dead ends: 40 [2022-11-22 01:17:22,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=228, Invalid=1253, Unknown=1, NotChecked=0, Total=1482 [2022-11-22 01:17:22,870 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 101 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:22,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 76 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:17:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-22 01:17:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-22 01:17:22,873 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) [2022-11-22 01:17:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-22 01:17:22,873 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2022-11-22 01:17:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:22,874 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-22 01:17:22,874 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) [2022-11-22 01:17:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-22 01:17:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:17:22,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:22,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:22,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:23,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:23,083 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)] === [2022-11-22 01:17:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash -564555932, now seen corresponding path program 1 times [2022-11-22 01:17:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:23,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36861493] [2022-11-22 01:17:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:23,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:23,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36861493] [2022-11-22 01:17:23,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36861493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:23,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:23,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:17:23,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538261070] [2022-11-22 01:17:23,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:23,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:17:23,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:23,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:17:23,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:17:23,324 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) [2022-11-22 01:17:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:23,405 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-11-22 01:17:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:17:23,406 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 [2022-11-22 01:17:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:23,406 INFO L225 Difference]: With dead ends: 41 [2022-11-22 01:17:23,406 INFO L226 Difference]: Without dead ends: 39 [2022-11-22 01:17:23,407 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 [2022-11-22 01:17:23,407 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:23,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:17:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-22 01:17:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-22 01:17:23,409 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) [2022-11-22 01:17:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-22 01:17:23,409 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 14 [2022-11-22 01:17:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:23,410 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-22 01:17:23,410 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) [2022-11-22 01:17:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-22 01:17:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:17:23,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:23,410 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:23,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-22 01:17:23,411 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)] === [2022-11-22 01:17:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:23,411 INFO L85 PathProgramCache]: Analyzing trace with hash 680763647, now seen corresponding path program 1 times [2022-11-22 01:17:23,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:23,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089081880] [2022-11-22 01:17:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:23,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:23,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089081880] [2022-11-22 01:17:23,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089081880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:23,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525049152] [2022-11-22 01:17:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:23,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:23,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:23,883 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:23,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:17:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:23,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 01:17:23,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:24,025 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 [2022-11-22 01:17:24,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:24,187 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 [2022-11-22 01:17:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:24,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:24,688 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 [2022-11-22 01:17:24,695 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 [2022-11-22 01:17:24,701 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 [2022-11-22 01:17:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:24,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525049152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:24,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562589181] [2022-11-22 01:17:24,728 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:17:24,728 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:24,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:24,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:24,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:24,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:24,796 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 [2022-11-22 01:17:24,820 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 [2022-11-22 01:17:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:24,871 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 [2022-11-22 01:17:25,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:25,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:25,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:25,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:25,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:25,057 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:17:25,058 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 [2022-11-22 01:17:25,237 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 [2022-11-22 01:17:25,405 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 [2022-11-22 01:17:25,559 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 [2022-11-22 01:17:25,607 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:28,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1974#(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 [2022-11-22 01:17:28,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:28,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:28,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-22 01:17:28,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225378915] [2022-11-22 01:17:28,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:28,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 01:17:28,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 01:17:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-11-22 01:17:28,934 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) [2022-11-22 01:17:29,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:29,666 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-11-22 01:17:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:17:29,666 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 [2022-11-22 01:17:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:29,667 INFO L225 Difference]: With dead ends: 42 [2022-11-22 01:17:29,667 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 01:17:29,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:17:29,668 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:29,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 96 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:17:29,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 01:17:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-11-22 01:17:29,671 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) [2022-11-22 01:17:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-22 01:17:29,671 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 16 [2022-11-22 01:17:29,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:29,672 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-22 01:17:29,672 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) [2022-11-22 01:17:29,672 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-22 01:17:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:17:29,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:29,673 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:29,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:29,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-22 01:17:29,879 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)] === [2022-11-22 01:17:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:29,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1869096757, now seen corresponding path program 2 times [2022-11-22 01:17:29,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:29,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219700850] [2022-11-22 01:17:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:30,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:30,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219700850] [2022-11-22 01:17:30,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219700850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:30,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37700813] [2022-11-22 01:17:30,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:17:30,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:30,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:30,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:30,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:17:30,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:17:30,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:17:30,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-22 01:17:30,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:30,875 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 [2022-11-22 01:17:30,928 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 [2022-11-22 01:17:31,088 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 [2022-11-22 01:17:31,460 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-11-22 01:17:31,460 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 [2022-11-22 01:17:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:31,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:34,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:34,247 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 [2022-11-22 01:17:34,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:34,270 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 [2022-11-22 01:17:34,281 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 [2022-11-22 01:17:34,289 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 [2022-11-22 01:17:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:34,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37700813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:34,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859624107] [2022-11-22 01:17:34,405 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 01:17:34,405 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:34,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:34,406 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:34,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:34,445 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 [2022-11-22 01:17:34,469 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 [2022-11-22 01:17:34,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:34,510 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 [2022-11-22 01:17:34,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:34,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:34,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:34,660 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 [2022-11-22 01:17:34,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:38,174 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2212#(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 [2022-11-22 01:17:38,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:38,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:38,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-22 01:17:38,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787713435] [2022-11-22 01:17:38,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:38,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 01:17:38,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:38,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 01:17:38,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1435, Unknown=1, NotChecked=0, Total=1640 [2022-11-22 01:17:38,177 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) [2022-11-22 01:17:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:40,458 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-11-22 01:17:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:17:40,459 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 [2022-11-22 01:17:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:40,459 INFO L225 Difference]: With dead ends: 47 [2022-11-22 01:17:40,460 INFO L226 Difference]: Without dead ends: 47 [2022-11-22 01:17:40,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=340, Invalid=2311, Unknown=1, NotChecked=0, Total=2652 [2022-11-22 01:17:40,462 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 107 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:40,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 69 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:17:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-22 01:17:40,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-22 01:17:40,463 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) [2022-11-22 01:17:40,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-11-22 01:17:40,464 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 17 [2022-11-22 01:17:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:40,464 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-11-22 01:17:40,465 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) [2022-11-22 01:17:40,465 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-11-22 01:17:40,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:17:40,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:40,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 01:17:40,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:40,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:40,671 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)] === [2022-11-22 01:17:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash 841918292, now seen corresponding path program 2 times [2022-11-22 01:17:40,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:40,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028576158] [2022-11-22 01:17:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:40,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:41,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:41,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028576158] [2022-11-22 01:17:41,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028576158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:41,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810563538] [2022-11-22 01:17:41,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:17:41,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:41,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:41,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:41,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:17:41,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:17:41,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:17:41,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-22 01:17:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:41,692 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 [2022-11-22 01:17:41,735 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 [2022-11-22 01:17:42,020 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 [2022-11-22 01:17:42,635 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-22 01:17:42,635 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 [2022-11-22 01:17:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:42,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:45,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:45,542 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 [2022-11-22 01:17:45,550 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 [2022-11-22 01:17:45,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:45,570 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 [2022-11-22 01:17:45,580 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 [2022-11-22 01:17:45,591 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 [2022-11-22 01:17:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:45,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810563538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:45,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920381538] [2022-11-22 01:17:45,788 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:17:45,789 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:45,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:45,789 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:45,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:45,809 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 [2022-11-22 01:17:45,843 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 14 treesize of output 10 [2022-11-22 01:17:45,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:45,890 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 [2022-11-22 01:17:46,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:46,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:46,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:46,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:46,032 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:17:46,032 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 [2022-11-22 01:17:46,200 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 [2022-11-22 01:17:46,342 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 [2022-11-22 01:17:46,490 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:48,874 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2462#(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 [2022-11-22 01:17:48,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:48,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:48,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-22 01:17:48,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961341069] [2022-11-22 01:17:48,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:48,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:17:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:17:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1413, Unknown=4, NotChecked=0, Total=1560 [2022-11-22 01:17:48,877 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) [2022-11-22 01:17:51,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:51,363 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-11-22 01:17:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:17:51,364 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 [2022-11-22 01:17:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:51,364 INFO L225 Difference]: With dead ends: 58 [2022-11-22 01:17:51,365 INFO L226 Difference]: Without dead ends: 58 [2022-11-22 01:17:51,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=297, Invalid=2351, Unknown=4, NotChecked=0, Total=2652 [2022-11-22 01:17:51,366 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 189 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:51,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 209 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:17:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-22 01:17:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2022-11-22 01:17:51,368 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) [2022-11-22 01:17:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-11-22 01:17:51,369 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 17 [2022-11-22 01:17:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:51,369 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-11-22 01:17:51,369 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) [2022-11-22 01:17:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-11-22 01:17:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:17:51,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:51,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 01:17:51,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:51,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-22 01:17:51,571 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)] === [2022-11-22 01:17:51,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:51,571 INFO L85 PathProgramCache]: Analyzing trace with hash 329663255, now seen corresponding path program 2 times [2022-11-22 01:17:51,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:51,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003893443] [2022-11-22 01:17:51,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:51,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:52,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003893443] [2022-11-22 01:17:52,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003893443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:52,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688657583] [2022-11-22 01:17:52,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:17:52,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:52,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:52,392 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:52,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:17:52,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:17:52,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:17:52,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-22 01:17:52,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:52,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:52,646 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 [2022-11-22 01:17:52,669 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 [2022-11-22 01:17:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:53,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:17:54,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688657583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:54,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882861318] [2022-11-22 01:17:54,011 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:17:54,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:54,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:54,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:54,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:54,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:54,046 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 [2022-11-22 01:17:54,071 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 [2022-11-22 01:17:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:54,114 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 [2022-11-22 01:17:54,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:54,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:54,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:54,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:54,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:54,277 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:17:54,277 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 [2022-11-22 01:17:54,440 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 [2022-11-22 01:17:54,606 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 [2022-11-22 01:17:54,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:57,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2734#(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 [2022-11-22 01:17:57,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:57,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:57,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2022-11-22 01:17:57,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138314808] [2022-11-22 01:17:57,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:57,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-22 01:17:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-22 01:17:57,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 01:17:57,025 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) [2022-11-22 01:17:59,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:59,185 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-11-22 01:17:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 01:17:59,185 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 [2022-11-22 01:17:59,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:59,186 INFO L225 Difference]: With dead ends: 81 [2022-11-22 01:17:59,186 INFO L226 Difference]: Without dead ends: 81 [2022-11-22 01:17:59,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=449, Invalid=2857, Unknown=0, NotChecked=0, Total=3306 [2022-11-22 01:17:59,189 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 177 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:59,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 134 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:17:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-22 01:17:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2022-11-22 01:17:59,193 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) [2022-11-22 01:17:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-22 01:17:59,195 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 18 [2022-11-22 01:17:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:59,195 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-22 01:17:59,196 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) [2022-11-22 01:17:59,196 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-22 01:17:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:17:59,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:59,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:59,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:59,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-22 01:17:59,410 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)] === [2022-11-22 01:17:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash -205748302, now seen corresponding path program 1 times [2022-11-22 01:17:59,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:59,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054412851] [2022-11-22 01:17:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:59,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:00,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:00,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054412851] [2022-11-22 01:18:00,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054412851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:18:00,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34138105] [2022-11-22 01:18:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:00,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:00,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:00,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:00,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:18:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:00,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-22 01:18:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:00,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:18:00,296 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 [2022-11-22 01:18:00,571 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 [2022-11-22 01:18:00,831 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 [2022-11-22 01:18:01,026 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-22 01:18:01,026 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 [2022-11-22 01:18:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:01,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:03,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:18:03,958 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 [2022-11-22 01:18:03,967 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 [2022-11-22 01:18:03,972 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 [2022-11-22 01:18:03,984 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 [2022-11-22 01:18:03,990 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 [2022-11-22 01:18:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:04,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34138105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:04,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [693123553] [2022-11-22 01:18:04,071 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:18:04,071 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:18:04,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:18:04,071 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:18:04,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:18:04,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:04,113 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 [2022-11-22 01:18:04,138 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 [2022-11-22 01:18:04,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:04,180 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 25 treesize of output 24 [2022-11-22 01:18:04,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:04,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:04,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:04,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:04,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:04,346 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:18:04,347 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 [2022-11-22 01:18:04,504 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 [2022-11-22 01:18:04,648 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 [2022-11-22 01:18:04,806 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 [2022-11-22 01:18:04,890 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:09,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3062#(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 [2022-11-22 01:18:09,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:09,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:18:09,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-11-22 01:18:09,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791273665] [2022-11-22 01:18:09,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:09,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 01:18:09,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:09,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 01:18:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2050, Unknown=5, NotChecked=0, Total=2256 [2022-11-22 01:18:09,354 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) [2022-11-22 01:18:12,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:18:16,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:18:17,066 WARN L837 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (or (forall ((v_ArrVal_378 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) (and (<= (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (<= 0 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)))) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= (+ (* 18446744073709551616 (div |c_ULTIMATE.start_main_~length~0#1| 18446744073709551616)) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) |c_ULTIMATE.start_main_~length~0#1|)) is different from false [2022-11-22 01:18:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:17,868 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2022-11-22 01:18:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 01:18:17,869 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 [2022-11-22 01:18:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:17,870 INFO L225 Difference]: With dead ends: 77 [2022-11-22 01:18:17,870 INFO L226 Difference]: Without dead ends: 77 [2022-11-22 01:18:17,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=430, Invalid=4121, Unknown=9, NotChecked=132, Total=4692 [2022-11-22 01:18:17,872 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 134 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 43 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:17,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 162 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 435 Invalid, 11 Unknown, 1 Unchecked, 4.7s Time] [2022-11-22 01:18:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-22 01:18:17,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2022-11-22 01:18:17,874 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) [2022-11-22 01:18:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-11-22 01:18:17,874 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 19 [2022-11-22 01:18:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:17,874 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-11-22 01:18:17,875 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) [2022-11-22 01:18:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-11-22 01:18:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:18:17,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:17,875 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:17,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:18,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-22 01:18:18,076 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)] === [2022-11-22 01:18:18,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:18,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1631322325, now seen corresponding path program 2 times [2022-11-22 01:18:18,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:18,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104349317] [2022-11-22 01:18:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:18,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:18,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:18,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104349317] [2022-11-22 01:18:18,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104349317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:18:18,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970300626] [2022-11-22 01:18:18,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:18:18,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:18,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:18,858 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:18,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:18:18,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:18:18,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:18,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-22 01:18:18,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:18,991 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 [2022-11-22 01:18:19,036 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 [2022-11-22 01:18:19,327 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 [2022-11-22 01:18:19,739 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-22 01:18:19,740 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 [2022-11-22 01:18:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:20,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:22,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:18:22,937 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 [2022-11-22 01:18:22,969 INFO L321 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-11-22 01:18:22,969 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 [2022-11-22 01:18:22,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:18:22,994 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 [2022-11-22 01:18:23,004 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 [2022-11-22 01:18:23,014 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 [2022-11-22 01:18:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:23,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970300626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:23,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951213826] [2022-11-22 01:18:23,197 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:18:23,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:18:23,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:18:23,198 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:18:23,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:18:23,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:23,236 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 [2022-11-22 01:18:23,263 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 [2022-11-22 01:18:23,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:23,305 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 [2022-11-22 01:18:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:23,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:23,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:23,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:23,468 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:18:23,469 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 [2022-11-22 01:18:23,635 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 [2022-11-22 01:18:23,760 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 [2022-11-22 01:18:23,918 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 [2022-11-22 01:18:23,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:28,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3409#(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 [2022-11-22 01:18:28,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:28,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:18:28,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-22 01:18:28,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123534299] [2022-11-22 01:18:28,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:18:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:18:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1723, Unknown=5, NotChecked=0, Total=1892 [2022-11-22 01:18:28,117 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) [2022-11-22 01:18:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:31,252 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-11-22 01:18:31,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 01:18:31,253 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 [2022-11-22 01:18:31,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:31,253 INFO L225 Difference]: With dead ends: 67 [2022-11-22 01:18:31,253 INFO L226 Difference]: Without dead ends: 67 [2022-11-22 01:18:31,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=346, Invalid=3071, Unknown=5, NotChecked=0, Total=3422 [2022-11-22 01:18:31,255 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 178 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:31,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 265 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:18:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-22 01:18:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2022-11-22 01:18:31,257 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) [2022-11-22 01:18:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-22 01:18:31,258 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 21 [2022-11-22 01:18:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:31,258 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-22 01:18:31,259 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) [2022-11-22 01:18:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-22 01:18:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:18:31,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:31,259 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:31,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-22 01:18:31,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:31,465 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)] === [2022-11-22 01:18:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash -529317857, now seen corresponding path program 2 times [2022-11-22 01:18:31,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:31,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294808372] [2022-11-22 01:18:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:31,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:33,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:33,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294808372] [2022-11-22 01:18:33,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294808372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:18:33,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82767437] [2022-11-22 01:18:33,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:18:33,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:33,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:33,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:33,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:18:33,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:18:33,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:33,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-22 01:18:33,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:33,140 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 [2022-11-22 01:18:33,145 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 [2022-11-22 01:18:33,226 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 [2022-11-22 01:18:33,692 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 [2022-11-22 01:18:35,425 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 [2022-11-22 01:18:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:36,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:36,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:18:36,019 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 [2022-11-22 01:18:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:36,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:37,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:18:37,828 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 [2022-11-22 01:18:37,835 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 [2022-11-22 01:18:37,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:18:37,867 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 [2022-11-22 01:18:37,877 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 [2022-11-22 01:18:37,885 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 [2022-11-22 01:18:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:18:38,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82767437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:38,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [160742926] [2022-11-22 01:18:38,239 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:18:38,239 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:18:38,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:18:38,240 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:18:38,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:18:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:38,277 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 [2022-11-22 01:18:38,300 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 [2022-11-22 01:18:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:38,342 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 [2022-11-22 01:18:38,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:38,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:38,494 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:18:38,495 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 [2022-11-22 01:18:38,669 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 [2022-11-22 01:18:38,796 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 [2022-11-22 01:18:38,941 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 [2022-11-22 01:18:39,001 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:43,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3744#(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 [2022-11-22 01:18:43,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:43,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:18:43,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 39 [2022-11-22 01:18:43,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988683911] [2022-11-22 01:18:43,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:43,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-22 01:18:43,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:43,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-22 01:18:43,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2674, Unknown=7, NotChecked=0, Total=2970 [2022-11-22 01:18:43,815 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) [2022-11-22 01:19:20,023 WARN L233 SmtUtils]: Spent 34.98s on a formula simplification. DAG size of input: 165 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:19:44,312 WARN L233 SmtUtils]: Spent 18.91s on a formula simplification. DAG size of input: 162 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:20:13,528 WARN L233 SmtUtils]: Spent 24.83s on a formula simplification. DAG size of input: 149 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:20:54,024 WARN L233 SmtUtils]: Spent 30.72s on a formula simplification. DAG size of input: 140 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:21:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:16,694 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2022-11-22 01:21:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-22 01:21:16,695 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 [2022-11-22 01:21:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:16,695 INFO L225 Difference]: With dead ends: 85 [2022-11-22 01:21:16,695 INFO L226 Difference]: Without dead ends: 44 [2022-11-22 01:21:16,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 158.6s TimeCoverageRelationStatistics Valid=1369, Invalid=8055, Unknown=82, NotChecked=0, Total=9506 [2022-11-22 01:21:16,697 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 346 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 127 mSolverCounterUnsat, 45 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 45 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:16,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 120 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 582 Invalid, 45 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 01:21:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-22 01:21:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-22 01:21:16,699 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) [2022-11-22 01:21:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-11-22 01:21:16,700 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 22 [2022-11-22 01:21:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:16,700 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-11-22 01:21:16,700 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) [2022-11-22 01:21:16,701 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-11-22 01:21:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:21:16,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:16,701 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-22 01:21:16,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-22 01:21:16,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-22 01:21:16,909 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)] === [2022-11-22 01:21:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2113270104, now seen corresponding path program 3 times [2022-11-22 01:21:16,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:21:16,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758104032] [2022-11-22 01:21:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:16,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:21:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:17,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:21:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758104032] [2022-11-22 01:21:17,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758104032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:21:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24869503] [2022-11-22 01:21:17,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:21:17,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:21:17,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:21:17,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:21:17,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:21:18,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:21:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:21:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-22 01:21:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:18,070 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 [2022-11-22 01:21:18,080 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 [2022-11-22 01:21:18,129 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 [2022-11-22 01:21:18,415 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 [2022-11-22 01:21:18,801 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 [2022-11-22 01:21:19,255 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2022-11-22 01:21:19,256 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 [2022-11-22 01:21:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:19,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:23,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:21:23,705 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 [2022-11-22 01:21:23,736 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-22 01:21:23,737 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 [2022-11-22 01:21:23,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:21:23,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:21:23,782 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 [2022-11-22 01:21:23,796 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 [2022-11-22 01:21:23,810 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 9 treesize of output 7 [2022-11-22 01:21:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:24,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24869503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:24,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812970837] [2022-11-22 01:21:24,381 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:21:24,381 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:21:24,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:21:24,382 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:21:24,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:21:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:24,408 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 [2022-11-22 01:21:24,443 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 [2022-11-22 01:21:24,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:24,478 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 [2022-11-22 01:21:24,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:24,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:21:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:24,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:21:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:24,606 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:21:24,606 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 [2022-11-22 01:21:24,735 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 [2022-11-22 01:21:24,877 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 [2022-11-22 01:21:25,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:21:27,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4140#(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 [2022-11-22 01:21:27,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:21:27,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:21:27,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2022-11-22 01:21:27,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680215064] [2022-11-22 01:21:27,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:21:27,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 01:21:27,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:21:27,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 01:21:27,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2351, Unknown=11, NotChecked=0, Total=2550 [2022-11-22 01:21:27,805 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) [2022-11-22 01:21:31,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:21:40,663 WARN L233 SmtUtils]: Spent 8.54s on a formula simplification. DAG size of input: 143 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:21:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:45,000 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-11-22 01:21:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 01:21:45,001 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 [2022-11-22 01:21:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:45,002 INFO L225 Difference]: With dead ends: 56 [2022-11-22 01:21:45,002 INFO L226 Difference]: Without dead ends: 56 [2022-11-22 01:21:45,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=477, Invalid=4199, Unknown=16, NotChecked=0, Total=4692 [2022-11-22 01:21:45,004 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 214 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 55 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:45,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 190 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 501 Invalid, 8 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 01:21:45,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-22 01:21:45,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2022-11-22 01:21:45,006 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) [2022-11-22 01:21:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-22 01:21:45,007 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 22 [2022-11-22 01:21:45,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:45,007 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-22 01:21:45,008 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) [2022-11-22 01:21:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-22 01:21:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 01:21:45,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:45,008 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:21:45,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:21:45,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 01:21:45,214 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)] === [2022-11-22 01:21:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash 959683711, now seen corresponding path program 3 times [2022-11-22 01:21:45,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:21:45,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597526661] [2022-11-22 01:21:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:45,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:21:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:46,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:21:46,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597526661] [2022-11-22 01:21:46,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597526661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:21:46,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662841118] [2022-11-22 01:21:46,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:21:46,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:21:46,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:21:46,092 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:21:46,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:21:46,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:21:46,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:21:46,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-22 01:21:46,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:46,267 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:21:46,268 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 [2022-11-22 01:21:46,275 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 [2022-11-22 01:21:46,320 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 [2022-11-22 01:21:46,601 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 [2022-11-22 01:21:47,007 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 [2022-11-22 01:21:47,402 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-22 01:21:47,402 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 [2022-11-22 01:21:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:47,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:49,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:21:49,129 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 [2022-11-22 01:21:49,137 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 [2022-11-22 01:21:49,149 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 [2022-11-22 01:21:49,203 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 [2022-11-22 01:21:49,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 01:21:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:49,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662841118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:49,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [295152073] [2022-11-22 01:21:49,362 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:21:49,362 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:21:49,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:21:49,363 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:21:49,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:21:49,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:49,388 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 [2022-11-22 01:21:49,418 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 [2022-11-22 01:21:49,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:49,458 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 [2022-11-22 01:21:49,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:49,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:21:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:49,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:21:49,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:49,606 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:21:49,606 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 [2022-11-22 01:21:49,723 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 [2022-11-22 01:21:49,839 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 [2022-11-22 01:21:49,992 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 [2022-11-22 01:21:50,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:21:54,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4481#(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 [2022-11-22 01:21:54,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:21:54,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:21:54,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2022-11-22 01:21:54,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945011292] [2022-11-22 01:21:54,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:21:54,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 01:21:54,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:21:54,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 01:21:54,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2741, Unknown=9, NotChecked=0, Total=2970 [2022-11-22 01:21:54,598 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) [2022-11-22 01:22:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:04,393 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-11-22 01:22:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:22:04,393 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 [2022-11-22 01:22:04,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:04,394 INFO L225 Difference]: With dead ends: 57 [2022-11-22 01:22:04,394 INFO L226 Difference]: Without dead ends: 57 [2022-11-22 01:22:04,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=464, Invalid=4781, Unknown=11, NotChecked=0, Total=5256 [2022-11-22 01:22:04,396 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 182 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 53 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:04,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 212 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 515 Invalid, 8 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:22:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-22 01:22:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-11-22 01:22:04,399 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) [2022-11-22 01:22:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-11-22 01:22:04,399 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 26 [2022-11-22 01:22:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:04,400 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-11-22 01:22:04,400 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) [2022-11-22 01:22:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-11-22 01:22:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 01:22:04,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:04,401 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-22 01:22:04,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:04,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:04,608 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)] === [2022-11-22 01:22:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:04,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2083872407, now seen corresponding path program 3 times [2022-11-22 01:22:04,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:04,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822442886] [2022-11-22 01:22:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:04,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:22:05,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822442886] [2022-11-22 01:22:05,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822442886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909635609] [2022-11-22 01:22:05,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:22:05,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:05,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:05,871 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:05,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:22:06,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:22:06,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:22:06,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-22 01:22:06,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:06,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:06,079 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 [2022-11-22 01:22:06,099 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 [2022-11-22 01:22:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:22:07,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:22:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:22:08,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909635609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:22:08,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2069266248] [2022-11-22 01:22:08,763 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:22:08,763 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:22:08,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:22:08,763 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:22:08,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:22:08,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:08,801 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 [2022-11-22 01:22:08,829 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 [2022-11-22 01:22:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:08,869 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 [2022-11-22 01:22:08,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:08,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:09,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:09,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:09,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:09,013 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:22:09,013 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 [2022-11-22 01:22:09,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:22:09,328 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 [2022-11-22 01:22:09,462 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:22:12,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4844#(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 [2022-11-22 01:22:12,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:22:12,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:22:12,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 40 [2022-11-22 01:22:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858435061] [2022-11-22 01:22:12,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:22:12,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 01:22:12,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 01:22:12,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2022-11-22 01:22:12,266 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) [2022-11-22 01:22:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:19,116 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-11-22 01:22:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-22 01:22:19,117 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 [2022-11-22 01:22:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:19,117 INFO L225 Difference]: With dead ends: 88 [2022-11-22 01:22:19,118 INFO L226 Difference]: Without dead ends: 88 [2022-11-22 01:22:19,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=745, Invalid=5897, Unknown=0, NotChecked=0, Total=6642 [2022-11-22 01:22:19,119 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 393 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:19,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 232 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 01:22:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-22 01:22:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2022-11-22 01:22:19,121 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) [2022-11-22 01:22:19,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-22 01:22:19,122 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 28 [2022-11-22 01:22:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:19,122 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-22 01:22:19,122 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) [2022-11-22 01:22:19,123 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-22 01:22:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 01:22:19,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:19,123 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:19,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:19,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:19,330 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)] === [2022-11-22 01:22:19,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1659839438, now seen corresponding path program 3 times [2022-11-22 01:22:19,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:19,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583116268] [2022-11-22 01:22:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:22:22,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:22,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583116268] [2022-11-22 01:22:22,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583116268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:22,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369261953] [2022-11-22 01:22:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:22:22,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:22,412 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:22,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:22:22,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:22:22,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:22:22,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-22 01:22:22,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:22,583 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:22:22,584 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 [2022-11-22 01:22:22,588 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 18 treesize of output 16 [2022-11-22 01:22:22,668 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 [2022-11-22 01:22:23,021 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 [2022-11-22 01:22:23,528 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 [2022-11-22 01:22:24,121 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 [2022-11-22 01:22:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:24,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:24,534 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:22:24,534 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 [2022-11-22 01:22:24,909 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-22 01:22:24,909 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 [2022-11-22 01:22:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:22:25,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:22:26,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:22:26,282 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 [2022-11-22 01:22:28,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:22:28,070 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 [2022-11-22 01:22:28,077 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 [2022-11-22 01:22:28,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:22:28,087 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 [2022-11-22 01:22:28,107 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 [2022-11-22 01:22:28,173 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 [2022-11-22 01:22:28,177 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 [2022-11-22 01:22:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:22:28,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369261953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:22:28,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [881297255] [2022-11-22 01:22:28,391 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:22:28,391 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:22:28,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:22:28,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:22:28,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:22:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:28,425 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 [2022-11-22 01:22:28,445 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 [2022-11-22 01:22:28,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:28,483 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 [2022-11-22 01:22:28,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:28,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:28,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:28,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:28,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:28,584 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:22:28,584 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 [2022-11-22 01:22:28,725 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 [2022-11-22 01:22:28,846 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 [2022-11-22 01:22:28,975 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 [2022-11-22 01:22:29,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:22:35,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5280#(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 [2022-11-22 01:22:35,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:22:35,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:22:35,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 60 [2022-11-22 01:22:35,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641506239] [2022-11-22 01:22:35,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:22:35,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-22 01:22:35,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:35,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-22 01:22:35,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=5299, Unknown=48, NotChecked=0, Total=5700 [2022-11-22 01:22:35,309 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) [2022-11-22 01:22:44,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:22:51,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:22:59,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:23:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:02,251 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2022-11-22 01:23:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 01:23:02,252 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 [2022-11-22 01:23:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:02,252 INFO L225 Difference]: With dead ends: 78 [2022-11-22 01:23:02,253 INFO L226 Difference]: Without dead ends: 62 [2022-11-22 01:23:02,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2754 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=1108, Invalid=11942, Unknown=60, NotChecked=0, Total=13110 [2022-11-22 01:23:02,255 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 360 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 100 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:02,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 91 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 954 Invalid, 20 Unknown, 0 Unchecked, 7.8s Time] [2022-11-22 01:23:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-22 01:23:02,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2022-11-22 01:23:02,257 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) [2022-11-22 01:23:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-11-22 01:23:02,258 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 29 [2022-11-22 01:23:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:02,258 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-11-22 01:23:02,258 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) [2022-11-22 01:23:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-11-22 01:23:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 01:23:02,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:02,259 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-22 01:23:02,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:02,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-22 01:23:02,460 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)] === [2022-11-22 01:23:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1902155224, now seen corresponding path program 4 times [2022-11-22 01:23:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:02,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053325670] [2022-11-22 01:23:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:23:04,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:04,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053325670] [2022-11-22 01:23:04,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053325670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:04,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484642178] [2022-11-22 01:23:04,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:23:04,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:04,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:04,225 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:04,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 01:23:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:04,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-22 01:23:04,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:04,370 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 [2022-11-22 01:23:04,428 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 [2022-11-22 01:23:04,744 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 [2022-11-22 01:23:12,514 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 [2022-11-22 01:23:29,658 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 [2022-11-22 01:23:42,208 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 [2022-11-22 01:23:42,897 INFO L321 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2022-11-22 01:23:42,897 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 [2022-11-22 01:23:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 44 refuted. 21 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:23:43,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:23:47,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:23:47,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 72 [2022-11-22 01:23:47,202 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-22 01:23:47,202 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 [2022-11-22 01:23:47,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:47,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:23:47,263 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 [2022-11-22 01:23:47,309 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 [2022-11-22 01:23:47,318 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 [2022-11-22 01:23:47,325 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 [2022-11-22 01:23:47,332 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 [2022-11-22 01:23:47,341 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 [2022-11-22 01:23:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:23:47,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484642178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:23:47,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986940609] [2022-11-22 01:23:47,573 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:23:47,573 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:23:47,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:23:47,574 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:23:47,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:23:47,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:47,604 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 [2022-11-22 01:23:47,633 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 [2022-11-22 01:23:47,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:47,676 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 [2022-11-22 01:23:47,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:47,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:47,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:47,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:47,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:47,797 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:23:47,797 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 [2022-11-22 01:23:47,935 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 [2022-11-22 01:23:48,047 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 [2022-11-22 01:23:48,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:23:51,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5752#(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 [2022-11-22 01:23:51,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:23:51,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:23:51,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 60 [2022-11-22 01:23:51,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416182311] [2022-11-22 01:23:51,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:23:51,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-22 01:23:51,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-22 01:23:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4599, Unknown=57, NotChecked=0, Total=4970 [2022-11-22 01:23:51,998 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) [2022-11-22 01:23:57,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:24:00,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:24:02,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:24:07,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:24:20,168 WARN L233 SmtUtils]: Spent 12.90s on a formula simplification. DAG size of input: 99 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:24:34,590 WARN L233 SmtUtils]: Spent 12.62s on a formula simplification. DAG size of input: 105 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:24:36,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:24:45,351 WARN L233 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 73 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:24:47,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:24:49,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:25:00,013 WARN L233 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 85 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:25:01,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:25:03,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:25:05,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:25:21,088 WARN L233 SmtUtils]: Spent 12.64s on a formula simplification. DAG size of input: 117 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:25:23,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:25:39,992 WARN L233 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 131 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:25:41,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:25:53,215 WARN L233 SmtUtils]: Spent 9.77s on a formula simplification. DAG size of input: 87 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:25:54,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:25:56,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:26:09,357 WARN L233 SmtUtils]: Spent 10.71s on a formula simplification. DAG size of input: 97 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:26:11,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:26:13,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:26:15,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:26:17,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:26:38,870 WARN L233 SmtUtils]: Spent 15.58s on a formula simplification. DAG size of input: 141 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:26:40,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:26:42,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:26:44,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:26:47,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:26:48,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:26:58,920 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 92 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:27:00,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:01,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:03,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:05,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:16,293 WARN L233 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 92 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:27:17,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:19,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:21,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:23,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:25,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:27,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:28,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:30,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:50,516 WARN L233 SmtUtils]: Spent 7.32s on a formula simplification. DAG size of input: 137 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:27:52,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:54,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:56,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:27:58,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:00,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:02,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:04,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:06,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:08,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:23,841 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 183 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:28:25,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:27,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:29,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:37,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:39,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:40,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:42,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:44,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:46,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:49,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:28:51,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:06,392 WARN L233 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 135 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:29:08,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:10,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:11,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:12,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:14,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:16,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:44,106 WARN L233 SmtUtils]: Spent 25.25s on a formula simplification. DAG size of input: 169 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:29:45,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:47,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:48,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:50,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:29:52,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:30:13,500 WARN L233 SmtUtils]: Spent 16.54s on a formula simplification. DAG size of input: 163 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:30:15,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:30:17,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:30:19,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:30:21,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:30:28,523 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 139 DAG size of output: 121 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:30:30,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:30:47,577 WARN L233 SmtUtils]: Spent 12.99s on a formula simplification. DAG size of input: 97 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:30:49,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:30:51,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:31:15,230 WARN L233 SmtUtils]: Spent 18.11s on a formula simplification. DAG size of input: 109 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:31:17,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:31:19,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:31:21,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:31:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:31:21,136 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-11-22 01:31:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 01:31:21,137 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 [2022-11-22 01:31:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:31:21,137 INFO L225 Difference]: With dead ends: 58 [2022-11-22 01:31:21,138 INFO L226 Difference]: Without dead ends: 58 [2022-11-22 01:31:21,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 353.8s TimeCoverageRelationStatistics Valid=947, Invalid=8273, Unknown=92, NotChecked=0, Total=9312 [2022-11-22 01:31:21,139 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 198 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 130 mSolverCounterUnsat, 77 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 77 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:31:21,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 507 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 929 Invalid, 77 Unknown, 0 Unchecked, 141.4s Time] [2022-11-22 01:31:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-22 01:31:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-11-22 01:31:21,141 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) [2022-11-22 01:31:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-11-22 01:31:21,142 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 32 [2022-11-22 01:31:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:31:21,142 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-11-22 01:31:21,142 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) [2022-11-22 01:31:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-11-22 01:31:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:31:21,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:31:21,143 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:31:21,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-22 01:31:21,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-22 01:31:21,349 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)] === [2022-11-22 01:31:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:31:21,350 INFO L85 PathProgramCache]: Analyzing trace with hash -55625729, now seen corresponding path program 4 times [2022-11-22 01:31:21,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:31:21,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769835993] [2022-11-22 01:31:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:21,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:31:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:31:23,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:31:23,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769835993] [2022-11-22 01:31:23,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769835993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:31:23,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450478513] [2022-11-22 01:31:23,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:31:23,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:31:23,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:31:23,015 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:31:23,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c86d927-cddb-4957-a6ce-ef0cc4b6cd7a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 01:31:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-22 01:31:23,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:31:23,168 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 [2022-11-22 01:31:23,220 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 [2022-11-22 01:31:23,541 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 [2022-11-22 01:31:24,026 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 [2022-11-22 01:31:24,597 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 [2022-11-22 01:31:25,266 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 [2022-11-22 01:31:25,875 INFO L321 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2022-11-22 01:31:25,876 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 [2022-11-22 01:31:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:31:26,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:31:30,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:31:30,035 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 [2022-11-22 01:31:30,070 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-22 01:31:30,070 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 [2022-11-22 01:31:30,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:30,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:31:30,112 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 [2022-11-22 01:31:30,118 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 [2022-11-22 01:31:30,123 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 [2022-11-22 01:31:30,127 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 [2022-11-22 01:31:30,138 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 [2022-11-22 01:31:30,198 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 [2022-11-22 01:31:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:31:30,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450478513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:31:30,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1590102075] [2022-11-22 01:31:30,325 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:31:30,325 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:31:30,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:31:30,325 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:31:30,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:31:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:30,351 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 [2022-11-22 01:31:30,388 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 [2022-11-22 01:31:30,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:30,429 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 [2022-11-22 01:31:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:30,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:30,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:30,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:30,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:30,536 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:31:30,536 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 [2022-11-22 01:31:30,655 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 [2022-11-22 01:31:30,793 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 [2022-11-22 01:31:30,919 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 [2022-11-22 01:31:30,945 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:31:36,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6200#(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 [2022-11-22 01:31:36,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:31:36,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:31:36,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 62 [2022-11-22 01:31:36,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462765117] [2022-11-22 01:31:36,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:31:36,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-22 01:31:36,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:31:36,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-22 01:31:36,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=5459, Unknown=42, NotChecked=0, Total=5852 [2022-11-22 01:31:36,968 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)