./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:03:57,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:03:57,949 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 21:03:57,955 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:03:57,956 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:03:57,984 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:03:57,985 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:03:57,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:03:57,986 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:03:57,987 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:03:57,988 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:03:57,988 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:03:57,989 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:03:57,989 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:03:57,990 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:03:57,991 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:03:57,991 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:03:57,992 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:03:57,992 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:03:57,993 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:03:57,994 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:03:57,995 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:03:57,995 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:03:57,996 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:03:57,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:03:57,997 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:03:57,998 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:03:57,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:03:57,999 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:03:57,999 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:03:58,000 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:03:58,000 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:03:58,001 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:03:58,001 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:03:58,002 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:03:58,002 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:03:58,002 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:03:58,003 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:03:58,003 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:03:58,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:03:58,004 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:03:58,004 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:03:58,005 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:03:58,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:03:58,005 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:03:58,005 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:03:58,005 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_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 [2023-11-06 21:03:58,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:03:58,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:03:58,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:03:58,346 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:03:58,347 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:03:58,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2023-11-06 21:04:01,420 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:04:01,804 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:04:01,805 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2023-11-06 21:04:01,823 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/data/75ac72cc6/aab1864311204f80ae772f4a8b53b9aa/FLAGa64e41888 [2023-11-06 21:04:01,841 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/data/75ac72cc6/aab1864311204f80ae772f4a8b53b9aa [2023-11-06 21:04:01,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:04:01,846 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:04:01,848 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:04:01,848 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:04:01,855 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:04:01,856 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:04:01" (1/1) ... [2023-11-06 21:04:01,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cbd220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:01, skipping insertion in model container [2023-11-06 21:04:01,858 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:04:01" (1/1) ... [2023-11-06 21:04:01,907 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:04:02,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:04:02,360 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:04:02,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:04:02,472 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:04:02,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02 WrapperNode [2023-11-06 21:04:02,473 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:04:02,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:04:02,474 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:04:02,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:04:02,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,544 INFO L138 Inliner]: procedures = 117, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2023-11-06 21:04:02,545 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:04:02,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:04:02,546 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:04:02,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:04:02,557 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,573 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,579 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:04:02,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:04:02,593 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:04:02,593 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:04:02,594 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (1/1) ... [2023-11-06 21:04:02,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:04:02,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:04:02,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:04:02,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:04:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:04:02,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:04:02,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:04:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:04:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:04:02,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:04:02,868 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:04:02,870 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:04:03,149 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:04:03,238 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:04:03,238 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 21:04:03,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:04:03 BoogieIcfgContainer [2023-11-06 21:04:03,242 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:04:03,245 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:04:03,246 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:04:03,255 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:04:03,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:04:01" (1/3) ... [2023-11-06 21:04:03,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c44790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:04:03, skipping insertion in model container [2023-11-06 21:04:03,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:04:02" (2/3) ... [2023-11-06 21:04:03,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c44790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:04:03, skipping insertion in model container [2023-11-06 21:04:03,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:04:03" (3/3) ... [2023-11-06 21:04:03,259 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncpy-alloca-2.i [2023-11-06 21:04:03,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:04:03,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-06 21:04:03,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:04:03,380 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2836ec53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:04:03,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-06 21:04:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 2.230769230769231) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:04:03,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:03,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:04:03,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:03,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:03,426 INFO L85 PathProgramCache]: Analyzing trace with hash 124707, now seen corresponding path program 1 times [2023-11-06 21:04:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:03,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957307117] [2023-11-06 21:04:03,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:03,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:03,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:03,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957307117] [2023-11-06 21:04:03,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957307117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:03,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:03,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:04:03,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484245644] [2023-11-06 21:04:03,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:03,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:04:03,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:04:03,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:04:03,799 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 2.230769230769231) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:03,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:03,882 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-11-06 21:04:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:04:03,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 21:04:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:03,894 INFO L225 Difference]: With dead ends: 23 [2023-11-06 21:04:03,895 INFO L226 Difference]: Without dead ends: 22 [2023-11-06 21:04:03,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:04:03,901 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:03,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 11 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:04:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-06 21:04:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-06 21:04:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-06 21:04:03,938 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 3 [2023-11-06 21:04:03,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:03,939 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-06 21:04:03,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-06 21:04:03,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:04:03,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:03,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:04:03,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:04:03,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:03,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash 124708, now seen corresponding path program 1 times [2023-11-06 21:04:03,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:03,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086201180] [2023-11-06 21:04:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:03,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:04,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:04,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086201180] [2023-11-06 21:04:04,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086201180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:04,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:04,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:04:04,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115903805] [2023-11-06 21:04:04,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:04,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:04:04,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:04,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:04:04,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:04:04,345 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:04,430 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-06 21:04:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:04:04,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 21:04:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:04,431 INFO L225 Difference]: With dead ends: 24 [2023-11-06 21:04:04,431 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 21:04:04,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:04:04,433 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:04,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:04:04,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 21:04:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-06 21:04:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:04,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-06 21:04:04,446 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 3 [2023-11-06 21:04:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:04,447 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-06 21:04:04,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-06 21:04:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:04:04,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:04,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:04:04,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:04:04,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:04,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:04,450 INFO L85 PathProgramCache]: Analyzing trace with hash 126888, now seen corresponding path program 1 times [2023-11-06 21:04:04,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:04,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963267452] [2023-11-06 21:04:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:04,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:04,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:04,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963267452] [2023-11-06 21:04:04,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963267452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:04,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:04,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:04:04,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576665267] [2023-11-06 21:04:04,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:04,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:04:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:04:04,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:04:04,833 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:04,874 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-06 21:04:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:04:04,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 21:04:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:04,878 INFO L225 Difference]: With dead ends: 23 [2023-11-06 21:04:04,879 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 21:04:04,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:04:04,887 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:04,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:04:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 21:04:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-06 21:04:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-06 21:04:04,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 3 [2023-11-06 21:04:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:04,896 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-06 21:04:04,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-06 21:04:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:04:04,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:04,897 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-06 21:04:04,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:04:04,897 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:04,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash 119906631, now seen corresponding path program 1 times [2023-11-06 21:04:04,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:04,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258859576] [2023-11-06 21:04:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:04,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:05,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:05,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258859576] [2023-11-06 21:04:05,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258859576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:04:05,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112113994] [2023-11-06 21:04:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:05,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:04:05,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:04:05,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:04:05,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:04:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:05,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 21:04:05,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:04:05,520 INFO L351 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 [2023-11-06 21:04:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:05,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:04:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:05,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112113994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:04:05,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130225296] [2023-11-06 21:04:05,775 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2023-11-06 21:04:05,775 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:04:05,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:04:05,785 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:04:05,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:04:06,760 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:04:07,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '215#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_main_#t~nondet13#1| 127) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet13#1|)) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0))' at error location [2023-11-06 21:04:07,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:04:07,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:04:07,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-06 21:04:07,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971304198] [2023-11-06 21:04:07,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:04:07,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:04:07,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:04:07,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:04:07,028 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:07,357 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2023-11-06 21:04:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:04:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:04:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:07,359 INFO L225 Difference]: With dead ends: 24 [2023-11-06 21:04:07,359 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 21:04:07,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:04:07,361 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:07,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:04:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 21:04:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2023-11-06 21:04:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-06 21:04:07,365 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 5 [2023-11-06 21:04:07,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:07,366 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-06 21:04:07,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:07,366 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-06 21:04:07,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:04:07,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:07,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:04:07,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:04:07,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:04:07,578 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:07,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash 121988892, now seen corresponding path program 1 times [2023-11-06 21:04:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:07,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698622186] [2023-11-06 21:04:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:07,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:07,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:07,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698622186] [2023-11-06 21:04:07,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698622186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:07,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:07,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:04:07,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662114205] [2023-11-06 21:04:07,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:07,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:04:07,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:04:07,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:04:07,668 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:07,716 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-06 21:04:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:04:07,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:04:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:07,718 INFO L225 Difference]: With dead ends: 19 [2023-11-06 21:04:07,718 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 21:04:07,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:04:07,720 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:07,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:04:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 21:04:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-06 21:04:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6923076923076923) 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) [2023-11-06 21:04:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-06 21:04:07,725 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 5 [2023-11-06 21:04:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:07,725 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-06 21:04:07,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-06 21:04:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:04:07,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:07,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:04:07,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:04:07,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:07,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:07,728 INFO L85 PathProgramCache]: Analyzing trace with hash 121988893, now seen corresponding path program 1 times [2023-11-06 21:04:07,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:07,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466006008] [2023-11-06 21:04:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:07,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:07,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:07,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466006008] [2023-11-06 21:04:07,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466006008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:07,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:07,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:04:07,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313821872] [2023-11-06 21:04:07,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:07,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:04:07,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:07,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:04:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:04:07,899 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:07,988 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-11-06 21:04:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:04:07,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:04:07,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:07,992 INFO L225 Difference]: With dead ends: 26 [2023-11-06 21:04:07,992 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 21:04:07,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:04:07,994 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:07,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:04:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 21:04:08,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2023-11-06 21:04:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-06 21:04:08,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 5 [2023-11-06 21:04:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:08,012 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-06 21:04:08,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-06 21:04:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 21:04:08,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:08,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:04:08,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:04:08,014 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:08,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:08,014 INFO L85 PathProgramCache]: Analyzing trace with hash -513259482, now seen corresponding path program 1 times [2023-11-06 21:04:08,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:08,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722625367] [2023-11-06 21:04:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:08,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:08,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:08,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722625367] [2023-11-06 21:04:08,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722625367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:08,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:08,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:04:08,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256355252] [2023-11-06 21:04:08,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:08,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:04:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:04:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:04:08,103 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:08,133 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-11-06 21:04:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:04:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 21:04:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:08,135 INFO L225 Difference]: With dead ends: 21 [2023-11-06 21:04:08,135 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 21:04:08,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:04:08,136 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:08,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:04:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 21:04:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 21:04:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.6) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-06 21:04:08,140 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2023-11-06 21:04:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:08,140 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-06 21:04:08,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-06 21:04:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 21:04:08,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:08,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:04:08,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:04:08,141 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:08,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash -513311624, now seen corresponding path program 1 times [2023-11-06 21:04:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:08,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558630353] [2023-11-06 21:04:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:08,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:08,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558630353] [2023-11-06 21:04:08,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558630353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:08,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:08,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:04:08,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814849733] [2023-11-06 21:04:08,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:08,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:04:08,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:08,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:04:08,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:04:08,316 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:08,395 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-11-06 21:04:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:04:08,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 21:04:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:08,396 INFO L225 Difference]: With dead ends: 20 [2023-11-06 21:04:08,396 INFO L226 Difference]: Without dead ends: 20 [2023-11-06 21:04:08,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:04:08,398 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:08,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 14 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:04:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-06 21:04:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-06 21:04:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-06 21:04:08,404 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 6 [2023-11-06 21:04:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:08,404 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-06 21:04:08,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-06 21:04:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 21:04:08,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:08,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:04:08,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:04:08,406 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:08,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash -513311623, now seen corresponding path program 1 times [2023-11-06 21:04:08,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:08,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104266595] [2023-11-06 21:04:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:08,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:08,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:08,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104266595] [2023-11-06 21:04:08,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104266595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:08,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:08,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:04:08,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191468984] [2023-11-06 21:04:08,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:08,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:04:08,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:08,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:04:08,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:04:08,659 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:08,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:08,756 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-06 21:04:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:04:08,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 21:04:08,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:08,758 INFO L225 Difference]: With dead ends: 19 [2023-11-06 21:04:08,758 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 21:04:08,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:04:08,759 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:08,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 15 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:04:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 21:04:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-06 21:04:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4666666666666666) 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) [2023-11-06 21:04:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-06 21:04:08,763 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 6 [2023-11-06 21:04:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:08,763 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-06 21:04:08,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-06 21:04:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:04:08,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:08,764 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:04:08,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:04:08,764 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:08,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1982974026, now seen corresponding path program 1 times [2023-11-06 21:04:08,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:08,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348987535] [2023-11-06 21:04:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:08,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:09,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:09,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348987535] [2023-11-06 21:04:09,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348987535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:09,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:09,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:04:09,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050808097] [2023-11-06 21:04:09,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:09,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:04:09,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:09,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:04:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:04:09,051 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:09,219 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-11-06 21:04:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:04:09,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 21:04:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:09,220 INFO L225 Difference]: With dead ends: 34 [2023-11-06 21:04:09,220 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 21:04:09,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:04:09,222 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:09,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 53 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:04:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 21:04:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2023-11-06 21:04:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.380952380952381) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-06 21:04:09,226 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 9 [2023-11-06 21:04:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:09,227 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-06 21:04:09,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-06 21:04:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:04:09,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:09,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:04:09,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:04:09,228 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:09,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:09,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1343204674, now seen corresponding path program 1 times [2023-11-06 21:04:09,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:09,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056557184] [2023-11-06 21:04:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:09,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:09,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:09,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056557184] [2023-11-06 21:04:09,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056557184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:09,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:09,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:04:09,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517435839] [2023-11-06 21:04:09,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:09,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:04:09,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:04:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:04:09,317 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:09,422 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-11-06 21:04:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:04:09,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 21:04:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:09,423 INFO L225 Difference]: With dead ends: 26 [2023-11-06 21:04:09,423 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 21:04:09,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:04:09,425 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:09,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:04:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 21:04:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-06 21:04:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-06 21:04:09,429 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2023-11-06 21:04:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:09,429 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-06 21:04:09,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-06 21:04:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:04:09,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:09,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:04:09,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 21:04:09,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:09,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1343204673, now seen corresponding path program 1 times [2023-11-06 21:04:09,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:09,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754101016] [2023-11-06 21:04:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:09,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:10,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754101016] [2023-11-06 21:04:10,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754101016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:10,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:10,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 21:04:10,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068676628] [2023-11-06 21:04:10,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:10,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:04:10,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:04:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:04:10,106 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:10,647 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-11-06 21:04:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:04:10,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 21:04:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:10,648 INFO L225 Difference]: With dead ends: 28 [2023-11-06 21:04:10,649 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 21:04:10,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:04:10,650 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:10,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 16 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:04:10,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 21:04:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-11-06 21:04:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-06 21:04:10,653 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 10 [2023-11-06 21:04:10,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:10,654 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-06 21:04:10,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:10,654 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-06 21:04:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:04:10,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:10,655 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:04:10,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 21:04:10,655 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:10,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash -315061351, now seen corresponding path program 1 times [2023-11-06 21:04:10,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:10,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6084515] [2023-11-06 21:04:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:10,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:11,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:11,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6084515] [2023-11-06 21:04:11,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6084515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:04:11,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982609066] [2023-11-06 21:04:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:11,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:04:11,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:04:11,029 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:04:11,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:04:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:11,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 21:04:11,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:04:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:11,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:04:11,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 21:04:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:11,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982609066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:04:11,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1806279666] [2023-11-06 21:04:11,569 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-06 21:04:11,570 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:04:11,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:04:11,571 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:04:11,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:04:13,801 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:04:17,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '807#(and (or (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post4#1.base|))) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0))' at error location [2023-11-06 21:04:17,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:04:17,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:04:17,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-11-06 21:04:17,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091802606] [2023-11-06 21:04:17,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:04:17,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:04:17,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:17,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:04:17,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=515, Unknown=2, NotChecked=0, Total=600 [2023-11-06 21:04:17,096 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:17,573 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-11-06 21:04:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:04:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 21:04:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:17,575 INFO L225 Difference]: With dead ends: 52 [2023-11-06 21:04:17,575 INFO L226 Difference]: Without dead ends: 52 [2023-11-06 21:04:17,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=129, Invalid=799, Unknown=2, NotChecked=0, Total=930 [2023-11-06 21:04:17,576 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:17,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 118 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:04:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-06 21:04:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2023-11-06 21:04:17,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-11-06 21:04:17,581 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2023-11-06 21:04:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:17,581 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-11-06 21:04:17,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:17,581 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-11-06 21:04:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:04:17,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:17,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:04:17,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:04:17,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:04:17,783 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:17,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:17,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1310326784, now seen corresponding path program 1 times [2023-11-06 21:04:17,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:17,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027163833] [2023-11-06 21:04:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:17,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:17,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:17,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027163833] [2023-11-06 21:04:17,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027163833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:04:17,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:04:17,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:04:17,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694516363] [2023-11-06 21:04:17,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:04:17,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:04:17,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:17,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:04:17,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:04:17,934 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:04:17,958 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2023-11-06 21:04:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:04:17,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 21:04:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:04:17,960 INFO L225 Difference]: With dead ends: 30 [2023-11-06 21:04:17,960 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 21:04:17,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:04:17,961 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:04:17,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:04:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 21:04:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-06 21:04:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-06 21:04:17,968 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 11 [2023-11-06 21:04:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:04:17,968 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-06 21:04:17,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:04:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-06 21:04:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 21:04:17,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:04:17,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:04:17,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 21:04:17,971 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 21:04:17,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:04:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash 800539052, now seen corresponding path program 1 times [2023-11-06 21:04:17,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:04:17,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244989138] [2023-11-06 21:04:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:17,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:04:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:18,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:04:18,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244989138] [2023-11-06 21:04:18,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244989138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:04:18,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704989244] [2023-11-06 21:04:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:04:18,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:04:18,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:04:18,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:04:19,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_911c0f4a-27a8-45d9-8994-7ee719a8d658/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:04:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:04:19,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-06 21:04:19,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:04:19,210 INFO L351 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 [2023-11-06 21:04:19,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:04:19,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 21:04:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:19,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:04:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:04:20,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704989244] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:04:20,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676589044] [2023-11-06 21:04:20,404 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-06 21:04:20,405 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:04:20,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:04:20,405 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:04:20,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:04:22,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:04:26,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1074#(and (<= 1 |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (= (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1) |ULTIMATE.start_cstrncpy_~us~0#1.offset|) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (not (= 0 (+ |ULTIMATE.start_cstrncpy_~n2~0#1| 1))) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= (select |#length| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_cstrncpy_~src~0#1.offset| 1) (= |ULTIMATE.start_main_~length~0#1| 1) (<= 2 |ULTIMATE.start_cstrncpy_~s2#1.base|) (= |ULTIMATE.start_cstrncpy_~us~0#1.base| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (= |ULTIMATE.start_cstrncpy_~dst~0#1.offset| 1) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0))' at error location [2023-11-06 21:04:26,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:04:26,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:04:26,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-11-06 21:04:26,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921675374] [2023-11-06 21:04:26,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:04:26,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:04:26,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:04:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:04:26,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 21:04:26,118 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)