./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a 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_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:37:38,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:37:38,999 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-02 12:37:39,008 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:37:39,010 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:37:39,045 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:37:39,046 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:37:39,047 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:37:39,048 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:37:39,050 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:37:39,050 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:37:39,051 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:37:39,051 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:37:39,051 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:37:39,052 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:37:39,054 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:37:39,054 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:37:39,055 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:37:39,055 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:37:39,055 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:37:39,056 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:37:39,060 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:37:39,061 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:37:39,061 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:37:39,061 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:37:39,062 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:37:39,062 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:37:39,062 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:37:39,062 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:37:39,062 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:37:39,063 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:37:39,063 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:37:39,063 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:37:39,063 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:37:39,064 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:37:39,066 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:37:39,067 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:37:39,067 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:37:39,067 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:37:39,067 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:37:39,067 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:37:39,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:37:39,068 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:37:39,068 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:37:39,069 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:37:39,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:37:39,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:37:39,070 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:37:39,070 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:37:39,070 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2024-11-02 12:37:39,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:37:39,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:37:39,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:37:39,439 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:37:39,440 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:37:39,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c Unable to find full path for "g++" [2024-11-02 12:37:41,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:37:42,083 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:37:42,084 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2024-11-02 12:37:42,089 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/data/830c93d97/29998dfa97c54e39bcfc375365440e69/FLAG850e53472 [2024-11-02 12:37:42,105 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/data/830c93d97/29998dfa97c54e39bcfc375365440e69 [2024-11-02 12:37:42,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:37:42,109 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:37:42,111 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:37:42,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:37:42,116 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:37:42,117 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,118 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a128f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42, skipping insertion in model container [2024-11-02 12:37:42,118 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,145 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:37:42,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:37:42,354 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:37:42,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:37:42,394 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:37:42,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42 WrapperNode [2024-11-02 12:37:42,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:37:42,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:37:42,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:37:42,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:37:42,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,414 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,437 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2024-11-02 12:37:42,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:37:42,438 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:37:42,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:37:42,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:37:42,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,453 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,458 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,467 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,475 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,477 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,482 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:37:42,483 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:37:42,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:37:42,487 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:37:42,488 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (1/1) ... [2024-11-02 12:37:42,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:37:42,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:42,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:37:42,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:37:42,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:37:42,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:37:42,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:37:42,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:37:42,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:37:42,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:37:42,656 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:37:42,658 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:37:42,932 INFO L? ?]: Removed 28 outVars from TransFormulas that were not future-live. [2024-11-02 12:37:42,932 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:37:42,998 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:37:42,998 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 12:37:42,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:37:42 BoogieIcfgContainer [2024-11-02 12:37:42,999 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:37:43,001 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:37:43,002 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:37:43,006 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:37:43,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:37:42" (1/3) ... [2024-11-02 12:37:43,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be2d037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:37:43, skipping insertion in model container [2024-11-02 12:37:43,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:42" (2/3) ... [2024-11-02 12:37:43,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be2d037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:37:43, skipping insertion in model container [2024-11-02 12:37:43,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:37:42" (3/3) ... [2024-11-02 12:37:43,009 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2024-11-02 12:37:43,030 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:37:43,030 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-11-02 12:37:43,096 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:37:43,105 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@39410e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:37:43,105 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-02 12:37:43,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 12:37:43,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:43,119 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 12:37:43,120 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:43,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash 3212319, now seen corresponding path program 1 times [2024-11-02 12:37:43,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:43,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99802487] [2024-11-02 12:37:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:43,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:43,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:43,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99802487] [2024-11-02 12:37:43,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99802487] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:43,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:37:43,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:37:43,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87785252] [2024-11-02 12:37:43,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:43,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:37:43,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:43,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:37:43,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:43,553 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:43,663 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2024-11-02 12:37:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:37:43,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-02 12:37:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:43,672 INFO L225 Difference]: With dead ends: 34 [2024-11-02 12:37:43,672 INFO L226 Difference]: Without dead ends: 33 [2024-11-02 12:37:43,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:43,677 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:43,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-02 12:37:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2024-11-02 12:37:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-02 12:37:43,714 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2024-11-02 12:37:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:43,714 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-02 12:37:43,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-02 12:37:43,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 12:37:43,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:43,716 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 12:37:43,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:37:43,717 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:43,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:43,718 INFO L85 PathProgramCache]: Analyzing trace with hash 3138242, now seen corresponding path program 1 times [2024-11-02 12:37:43,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:43,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408825304] [2024-11-02 12:37:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:43,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:43,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408825304] [2024-11-02 12:37:43,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408825304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:43,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:37:43,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:37:43,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913231880] [2024-11-02 12:37:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:43,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:37:43,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:37:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:43,820 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:43,886 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-11-02 12:37:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:37:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-02 12:37:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:43,888 INFO L225 Difference]: With dead ends: 24 [2024-11-02 12:37:43,888 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:37:43,889 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:43,891 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:43,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:43,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:37:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-11-02 12:37:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-02 12:37:43,897 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2024-11-02 12:37:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:43,897 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-02 12:37:43,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-02 12:37:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 12:37:43,898 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:43,899 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 12:37:43,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:37:43,899 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:43,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash 3140272, now seen corresponding path program 1 times [2024-11-02 12:37:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081941461] [2024-11-02 12:37:43,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:43,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:44,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:44,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081941461] [2024-11-02 12:37:44,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081941461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:44,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:37:44,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:37:44,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547034603] [2024-11-02 12:37:44,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:44,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:37:44,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:44,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:37:44,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:44,095 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:44,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:44,175 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-11-02 12:37:44,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:37:44,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-02 12:37:44,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:44,176 INFO L225 Difference]: With dead ends: 24 [2024-11-02 12:37:44,176 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:37:44,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:44,182 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:44,183 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:37:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-11-02 12:37:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-02 12:37:44,187 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2024-11-02 12:37:44,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:44,187 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-02 12:37:44,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-02 12:37:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-02 12:37:44,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:44,188 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-02 12:37:44,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:37:44,188 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:44,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:44,189 INFO L85 PathProgramCache]: Analyzing trace with hash 97285555, now seen corresponding path program 1 times [2024-11-02 12:37:44,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:44,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595457263] [2024-11-02 12:37:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:44,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:44,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:44,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595457263] [2024-11-02 12:37:44,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595457263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:44,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:37:44,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:37:44,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011064630] [2024-11-02 12:37:44,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:44,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:37:44,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:37:44,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:37:44,299 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:44,377 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-02 12:37:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:37:44,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-02 12:37:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:44,379 INFO L225 Difference]: With dead ends: 21 [2024-11-02 12:37:44,379 INFO L226 Difference]: Without dead ends: 21 [2024-11-02 12:37:44,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:37:44,381 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:44,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-02 12:37:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-02 12:37:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-02 12:37:44,392 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2024-11-02 12:37:44,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:44,393 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-02 12:37:44,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-02 12:37:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-02 12:37:44,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:44,394 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-02 12:37:44,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:37:44,395 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:44,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:44,398 INFO L85 PathProgramCache]: Analyzing trace with hash 97285556, now seen corresponding path program 1 times [2024-11-02 12:37:44,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:44,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078273428] [2024-11-02 12:37:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:44,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:44,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:44,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078273428] [2024-11-02 12:37:44,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078273428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:44,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:37:44,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:37:44,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902012913] [2024-11-02 12:37:44,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:44,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:37:44,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:44,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:37:44,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:37:44,656 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:44,745 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-11-02 12:37:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:37:44,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-02 12:37:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:44,747 INFO L225 Difference]: With dead ends: 22 [2024-11-02 12:37:44,747 INFO L226 Difference]: Without dead ends: 22 [2024-11-02 12:37:44,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:37:44,750 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:44,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:44,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-02 12:37:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-02 12:37:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-02 12:37:44,760 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2024-11-02 12:37:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:44,760 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-02 12:37:44,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-02 12:37:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:37:44,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:44,761 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-02 12:37:44,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:37:44,762 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:44,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash -997809686, now seen corresponding path program 1 times [2024-11-02 12:37:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223290474] [2024-11-02 12:37:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:44,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:44,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223290474] [2024-11-02 12:37:44,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223290474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:44,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19497203] [2024-11-02 12:37:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:44,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:44,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:44,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:44,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:37:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:44,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:37:45,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:45,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:45,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19497203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144760707] [2024-11-02 12:37:45,146 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:37:45,146 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:45,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:45,159 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:45,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:45,736 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:45,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1144760707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:45,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:45,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2024-11-02 12:37:45,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348384302] [2024-11-02 12:37:45,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:45,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:37:45,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:45,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:37:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:37:45,934 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:46,247 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-02 12:37:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:37:46,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 12:37:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:46,248 INFO L225 Difference]: With dead ends: 30 [2024-11-02 12:37:46,248 INFO L226 Difference]: Without dead ends: 30 [2024-11-02 12:37:46,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:37:46,250 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:46,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-02 12:37:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-11-02 12:37:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5454545454545454) 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) [2024-11-02 12:37:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-02 12:37:46,258 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2024-11-02 12:37:46,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:46,261 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-02 12:37:46,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-02 12:37:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:37:46,262 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:46,262 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-02 12:37:46,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:37:46,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:46,463 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:46,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:46,464 INFO L85 PathProgramCache]: Analyzing trace with hash -867329140, now seen corresponding path program 1 times [2024-11-02 12:37:46,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:46,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226989006] [2024-11-02 12:37:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:46,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:46,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:46,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226989006] [2024-11-02 12:37:46,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226989006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:46,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582574673] [2024-11-02 12:37:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:46,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:46,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:46,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:46,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:37:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:46,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-02 12:37:46,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:46,790 INFO L378 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 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-02 12:37:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:46,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:46,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582574673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:46,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570540899] [2024-11-02 12:37:46,994 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:37:46,995 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:46,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:46,996 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:46,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:47,307 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:47,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '437#(exists ((|v_ULTIMATE.start_foo_~b#1.base_15| Int) (|v_ULTIMATE.start_foo_~b#1.offset_14| Int) (|v_ULTIMATE.start_foo_~i~0#1_44| Int)) (and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |v_ULTIMATE.start_foo_~b#1.offset_14| 0) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 2 |v_ULTIMATE.start_foo_~b#1.base_15|) (= 32 |ULTIMATE.start_foo_~size#1|) (<= (select |#length| |v_ULTIMATE.start_foo_~b#1.base_15|) |v_ULTIMATE.start_foo_~i~0#1_44|) (<= |v_ULTIMATE.start_foo_~i~0#1_44| 31) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_44|)))' at error location [2024-11-02 12:37:47,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:47,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:47,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-02 12:37:47,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177890177] [2024-11-02 12:37:47,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:47,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 12:37:47,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:47,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 12:37:47,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-02 12:37:47,764 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:47,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:47,976 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2024-11-02 12:37:47,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:37:47,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-02 12:37:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:47,979 INFO L225 Difference]: With dead ends: 47 [2024-11-02 12:37:47,979 INFO L226 Difference]: Without dead ends: 47 [2024-11-02 12:37:47,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-11-02 12:37:47,980 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 99 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:47,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 25 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-02 12:37:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-02 12:37:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.5) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2024-11-02 12:37:47,991 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 8 [2024-11-02 12:37:47,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:47,991 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2024-11-02 12:37:47,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2024-11-02 12:37:47,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:37:47,992 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:47,992 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:48,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:37:48,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:48,193 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:48,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:48,194 INFO L85 PathProgramCache]: Analyzing trace with hash -217830189, now seen corresponding path program 1 times [2024-11-02 12:37:48,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:48,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349410037] [2024-11-02 12:37:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:48,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:48,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:48,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349410037] [2024-11-02 12:37:48,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349410037] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:48,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:37:48,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:37:48,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349490641] [2024-11-02 12:37:48,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:48,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:37:48,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:48,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:37:48,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:48,243 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2024-11-02 12:37:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:48,272 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2024-11-02 12:37:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:37:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 12:37:48,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:48,275 INFO L225 Difference]: With dead ends: 45 [2024-11-02 12:37:48,275 INFO L226 Difference]: Without dead ends: 45 [2024-11-02 12:37:48,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:48,276 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:48,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 7 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:37:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-02 12:37:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-02 12:37:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.45) internal successors, (58), 44 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) [2024-11-02 12:37:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2024-11-02 12:37:48,287 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 10 [2024-11-02 12:37:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:48,287 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2024-11-02 12:37:48,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2024-11-02 12:37:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2024-11-02 12:37:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:37:48,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:48,289 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:48,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 12:37:48,290 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:48,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:48,291 INFO L85 PathProgramCache]: Analyzing trace with hash -217830188, now seen corresponding path program 1 times [2024-11-02 12:37:48,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:48,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636715536] [2024-11-02 12:37:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:48,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:48,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:48,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636715536] [2024-11-02 12:37:48,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636715536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:48,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561123638] [2024-11-02 12:37:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:48,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:48,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:48,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:48,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:37:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:48,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:37:48,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:48,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:48,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561123638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:48,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229210707] [2024-11-02 12:37:48,602 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:37:48,602 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:48,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:48,602 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:48,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:49,683 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:49,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '636#true' at error location [2024-11-02 12:37:49,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:49,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:49,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2024-11-02 12:37:49,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602398457] [2024-11-02 12:37:49,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:49,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:37:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:49,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:37:49,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-02 12:37:49,804 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:50,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:50,100 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2024-11-02 12:37:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:37:50,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 12:37:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:50,101 INFO L225 Difference]: With dead ends: 48 [2024-11-02 12:37:50,101 INFO L226 Difference]: Without dead ends: 48 [2024-11-02 12:37:50,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2024-11-02 12:37:50,103 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 67 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:50,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 6 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-02 12:37:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2024-11-02 12:37:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 45 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) [2024-11-02 12:37:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2024-11-02 12:37:50,108 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 10 [2024-11-02 12:37:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:50,108 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2024-11-02 12:37:50,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2024-11-02 12:37:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 12:37:50,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:50,109 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2024-11-02 12:37:50,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:37:50,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:50,311 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:50,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1142696012, now seen corresponding path program 2 times [2024-11-02 12:37:50,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:50,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480868789] [2024-11-02 12:37:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:50,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:50,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480868789] [2024-11-02 12:37:50,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480868789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:50,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682480351] [2024-11-02 12:37:50,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:37:50,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:50,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:50,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:50,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:37:50,691 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:37:50,692 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:37:50,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-02 12:37:50,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:50,711 INFO L378 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 13 treesize of output 1 [2024-11-02 12:37:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-02 12:37:50,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-02 12:37:51,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682480351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:51,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405387341] [2024-11-02 12:37:51,199 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:37:51,199 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:51,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:51,200 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:51,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:51,435 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:52,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '925#(exists ((|v_ULTIMATE.start_foo_~i~0#1_73| Int) (|v_ULTIMATE.start_foo_~b#1.offset_19| Int) (|v_ULTIMATE.start_foo_~b#1.base_20| Int)) (and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 2 |v_ULTIMATE.start_foo_~b#1.base_20|) (<= (select |#length| |v_ULTIMATE.start_foo_~b#1.base_20|) |v_ULTIMATE.start_foo_~i~0#1_73|) (= 32 |ULTIMATE.start_foo_~size#1|) (= |v_ULTIMATE.start_foo_~b#1.offset_19| 0) (<= |v_ULTIMATE.start_foo_~i~0#1_73| 31) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_73|)))' at error location [2024-11-02 12:37:52,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:52,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:52,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2024-11-02 12:37:52,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326020925] [2024-11-02 12:37:52,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:52,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-02 12:37:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-02 12:37:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:37:52,145 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:52,709 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-11-02 12:37:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:37:52,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-02 12:37:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:52,710 INFO L225 Difference]: With dead ends: 52 [2024-11-02 12:37:52,710 INFO L226 Difference]: Without dead ends: 52 [2024-11-02 12:37:52,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2024-11-02 12:37:52,712 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 71 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:52,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 16 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:37:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-02 12:37:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2024-11-02 12:37:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 39 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) [2024-11-02 12:37:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-11-02 12:37:52,716 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 17 [2024-11-02 12:37:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:52,717 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-11-02 12:37:52,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-11-02 12:37:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-02 12:37:52,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:52,719 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:52,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:37:52,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:52,924 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:52,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash -956812969, now seen corresponding path program 1 times [2024-11-02 12:37:52,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:52,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101023970] [2024-11-02 12:37:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:52,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:53,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:53,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101023970] [2024-11-02 12:37:53,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101023970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:53,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141331633] [2024-11-02 12:37:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:53,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:53,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:53,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:53,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:37:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:53,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:37:53,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:53,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:53,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141331633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:53,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894225728] [2024-11-02 12:37:53,483 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-02 12:37:53,483 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:53,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:53,483 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:53,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:54,265 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:54,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1180#(and (exists ((|v_#valid_45| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.offset_26| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_21| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_31| Int)) (and (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_31|)) (= (select |v_#valid_45| |v_ULTIMATE.start_main_~#b~0#1.base_31|) 1) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_26|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_31|) |v_ULTIMATE.start_main_~#b~0#1.offset_26|) 32)) (= (store (store |v_#valid_45| |v_ULTIMATE.start_main_~#b~0#1.base_31| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_21| 0) |#valid|))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (= |ULTIMATE.start_main_~i~1#1| 0) (exists ((|v_ULTIMATE.start_main_~i~1#1_52| Int)) (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_52| 4294967296))) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2024-11-02 12:37:54,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:54,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:54,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-02 12:37:54,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000920900] [2024-11-02 12:37:54,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:54,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-02 12:37:54,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:54,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-02 12:37:54,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=401, Unknown=1, NotChecked=0, Total=552 [2024-11-02 12:37:54,685 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:54,792 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2024-11-02 12:37:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:37:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-02 12:37:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:54,794 INFO L225 Difference]: With dead ends: 76 [2024-11-02 12:37:54,794 INFO L226 Difference]: Without dead ends: 76 [2024-11-02 12:37:54,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=401, Unknown=1, NotChecked=0, Total=552 [2024-11-02 12:37:54,795 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:54,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:37:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-02 12:37:54,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-02 12:37:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 73 states have (on average 1.095890410958904) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2024-11-02 12:37:54,807 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 21 [2024-11-02 12:37:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:54,807 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2024-11-02 12:37:54,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2024-11-02 12:37:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 12:37:54,811 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:54,811 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:54,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-02 12:37:55,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-02 12:37:55,016 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:55,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:55,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1405887575, now seen corresponding path program 2 times [2024-11-02 12:37:55,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:55,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207244386] [2024-11-02 12:37:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:55,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:55,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:55,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207244386] [2024-11-02 12:37:55,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207244386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:55,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687169495] [2024-11-02 12:37:55,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:37:55,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:55,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:55,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:55,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:37:55,512 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-02 12:37:55,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:37:55,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 12:37:55,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:56,021 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_22| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_32| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_22|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32|) 0) (= v_DerPreprocessor_1 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32| v_DerPreprocessor_1) |v_ULTIMATE.start_main_~#mask~0#1.base_22| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#b~0#1.base_32|)) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_22| 0)))) is different from true [2024-11-02 12:37:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-02 12:37:56,023 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:37:56,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687169495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:56,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:37:56,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 16 [2024-11-02 12:37:56,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392013821] [2024-11-02 12:37:56,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:56,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:37:56,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:56,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:37:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=127, Unknown=1, NotChecked=26, Total=240 [2024-11-02 12:37:56,028 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2024-11-02 12:37:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:56,086 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2024-11-02 12:37:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:37:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 39 [2024-11-02 12:37:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:56,087 INFO L225 Difference]: With dead ends: 77 [2024-11-02 12:37:56,088 INFO L226 Difference]: Without dead ends: 76 [2024-11-02 12:37:56,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=127, Unknown=1, NotChecked=26, Total=240 [2024-11-02 12:37:56,089 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:56,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2024-11-02 12:37:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-02 12:37:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-02 12:37:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 73 states have (on average 1.082191780821918) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2024-11-02 12:37:56,100 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 39 [2024-11-02 12:37:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:56,102 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2024-11-02 12:37:56,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2024-11-02 12:37:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2024-11-02 12:37:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-02 12:37:56,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:56,103 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:56,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:37:56,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-02 12:37:56,304 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:56,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:56,305 INFO L85 PathProgramCache]: Analyzing trace with hash 632848102, now seen corresponding path program 1 times [2024-11-02 12:37:56,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:56,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515959970] [2024-11-02 12:37:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:56,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:56,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:56,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515959970] [2024-11-02 12:37:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515959970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:56,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972811299] [2024-11-02 12:37:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:56,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:56,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:56,729 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:56,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:37:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:56,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 12:37:56,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:57,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:57,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972811299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:57,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676345653] [2024-11-02 12:37:57,807 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-02 12:37:57,807 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:57,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:57,808 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:57,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:58,544 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:59,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1892#(and (exists ((|v_ULTIMATE.start_main_~i~1#1_63| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~1#1_63|) (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_63| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_33| Int) (|v_#valid_50| (Array Int Int)) (|v_ULTIMATE.start_main_~#mask~0#1.base_23| Int)) (= (store (store |v_#valid_50| |v_ULTIMATE.start_main_~#b~0#1.base_33| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_23| 0) |#valid|)) (exists ((|v_ULTIMATE.start_main_old_#valid#1_11| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_11| |#valid|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-02 12:37:59,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:59,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:59,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2024-11-02 12:37:59,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762446737] [2024-11-02 12:37:59,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:59,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-02 12:37:59,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:59,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-02 12:37:59,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2024-11-02 12:37:59,271 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 35 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:59,470 INFO L93 Difference]: Finished difference Result 148 states and 151 transitions. [2024-11-02 12:37:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-02 12:37:59,471 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 35 states have internal predecessors, (104), 0 states have call successors, (0), 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 40 [2024-11-02 12:37:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:59,471 INFO L225 Difference]: With dead ends: 148 [2024-11-02 12:37:59,471 INFO L226 Difference]: Without dead ends: 148 [2024-11-02 12:37:59,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2024-11-02 12:37:59,473 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:59,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 41 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:37:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-02 12:37:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2024-11-02 12:37:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.0413793103448277) internal successors, (151), 147 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2024-11-02 12:37:59,482 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 40 [2024-11-02 12:37:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:59,483 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2024-11-02 12:37:59,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 35 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2024-11-02 12:37:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-02 12:37:59,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:59,485 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:59,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-02 12:37:59,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-02 12:37:59,686 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:37:59,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:59,687 INFO L85 PathProgramCache]: Analyzing trace with hash -566650650, now seen corresponding path program 2 times [2024-11-02 12:37:59,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:59,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607107671] [2024-11-02 12:37:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:59,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:38:00,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:00,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607107671] [2024-11-02 12:38:00,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607107671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:00,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435171845] [2024-11-02 12:38:00,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:38:00,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:00,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:00,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:00,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 12:38:00,853 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-02 12:38:00,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:38:00,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 12:38:00,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:01,551 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_34| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_24| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_24|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_34|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_34| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_24| 0)) (= v_DerPreprocessor_3 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_34| v_DerPreprocessor_3) |v_ULTIMATE.start_main_~#mask~0#1.base_24| v_DerPreprocessor_4) |v_ULTIMATE.start_main_~#b~0#1.base_34|)))) is different from true [2024-11-02 12:38:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2024-11-02 12:38:01,553 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:38:01,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435171845] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:01,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:38:01,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [25] total 28 [2024-11-02 12:38:01,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214950918] [2024-11-02 12:38:01,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:01,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:38:01,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:38:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=397, Unknown=1, NotChecked=50, Total=756 [2024-11-02 12:38:01,557 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:01,613 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2024-11-02 12:38:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:38:01,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-02 12:38:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:01,615 INFO L225 Difference]: With dead ends: 147 [2024-11-02 12:38:01,615 INFO L226 Difference]: Without dead ends: 146 [2024-11-02 12:38:01,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=308, Invalid=397, Unknown=1, NotChecked=50, Total=756 [2024-11-02 12:38:01,616 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:01,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2024-11-02 12:38:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-02 12:38:01,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2024-11-02 12:38:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.0347222222222223) internal successors, (149), 145 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2024-11-02 12:38:01,623 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 76 [2024-11-02 12:38:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:01,623 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2024-11-02 12:38:01,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2024-11-02 12:38:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-02 12:38:01,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:01,625 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:01,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-02 12:38:01,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:01,829 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:38:01,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:01,830 INFO L85 PathProgramCache]: Analyzing trace with hash -566651626, now seen corresponding path program 1 times [2024-11-02 12:38:01,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:01,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933077038] [2024-11-02 12:38:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:01,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:38:02,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:02,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933077038] [2024-11-02 12:38:02,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933077038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:02,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747312761] [2024-11-02 12:38:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:02,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:02,852 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:02,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-02 12:38:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:02,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-02 12:38:02,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:38:04,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:38:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:38:05,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747312761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:38:05,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [170029385] [2024-11-02 12:38:05,720 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-02 12:38:05,723 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:38:05,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:38:05,724 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:38:05,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:38:06,392 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:38:07,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2742#true' at error location [2024-11-02 12:38:07,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:38:07,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:38:07,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 71 [2024-11-02 12:38:07,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777993726] [2024-11-02 12:38:07,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:38:07,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-02 12:38:07,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-02 12:38:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=3783, Unknown=0, NotChecked=0, Total=5852 [2024-11-02 12:38:07,634 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 71 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:08,061 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2024-11-02 12:38:08,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-02 12:38:08,063 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 71 states have internal predecessors, (211), 0 states have call successors, (0), 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 76 [2024-11-02 12:38:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:08,064 INFO L225 Difference]: With dead ends: 206 [2024-11-02 12:38:08,065 INFO L226 Difference]: Without dead ends: 206 [2024-11-02 12:38:08,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 153 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2069, Invalid=3783, Unknown=0, NotChecked=0, Total=5852 [2024-11-02 12:38:08,071 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:08,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:38:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-02 12:38:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2024-11-02 12:38:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 204 states have (on average 1.0245098039215685) internal successors, (209), 205 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 209 transitions. [2024-11-02 12:38:08,087 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 209 transitions. Word has length 76 [2024-11-02 12:38:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:08,088 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 209 transitions. [2024-11-02 12:38:08,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 71 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 209 transitions. [2024-11-02 12:38:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-02 12:38:08,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:08,091 INFO L215 NwaCegarLoop]: trace histogram [32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:08,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-02 12:38:08,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-02 12:38:08,291 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-02 12:38:08,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1638195178, now seen corresponding path program 2 times [2024-11-02 12:38:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933265647] [2024-11-02 12:38:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:08,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2024-11-02 12:38:08,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:08,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933265647] [2024-11-02 12:38:08,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933265647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:08,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813142869] [2024-11-02 12:38:08,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:38:08,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:08,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:08,645 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:08,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974b548e-c744-4ed4-9722-8d06d6505bbd/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-02 12:38:08,749 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:38:08,749 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:38:08,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 12:38:08,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2024-11-02 12:38:08,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:38:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2024-11-02 12:38:09,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813142869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:38:09,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [816057105] [2024-11-02 12:38:09,263 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-02 12:38:09,264 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:38:09,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:38:09,265 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:38:09,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:38:09,987 INFO L180 IcfgInterpreter]: Interpretation finished