./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b19ed65fc9d9f8e19f4d644b05d37e3da28cb107a90eedb15c652c094a7f23f1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:21:45,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:21:45,350 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-24 23:21:45,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:21:45,357 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:21:45,385 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:21:45,386 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:21:45,387 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:21:45,388 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:21:45,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:21:45,390 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:21:45,391 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:21:45,392 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:21:45,392 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:21:45,393 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:21:45,394 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:21:45,394 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:21:45,395 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:21:45,395 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:21:45,396 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:21:45,397 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:21:45,397 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:21:45,398 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 23:21:45,399 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 23:21:45,399 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:21:45,400 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:21:45,401 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:21:45,401 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:21:45,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:21:45,402 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 23:21:45,403 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 23:21:45,403 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 23:21:45,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:21:45,404 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 23:21:45,405 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:21:45,406 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:21:45,406 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:21:45,407 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:21:45,407 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:21:45,408 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:21:45,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:21:45,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:21:45,415 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:21:45,416 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:21:45,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:21:45,417 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:21:45,418 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:21:45,418 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:21:45,419 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_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b19ed65fc9d9f8e19f4d644b05d37e3da28cb107a90eedb15c652c094a7f23f1 [2023-11-24 23:21:45,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:21:45,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:21:45,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:21:45,746 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:21:45,746 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:21:45,748 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2023-11-24 23:21:48,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:21:49,220 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:21:49,221 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2023-11-24 23:21:49,241 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/data/4c1e5e7da/f5db27a718634d51aff61b3d19bfc9a6/FLAGb19a254a8 [2023-11-24 23:21:49,258 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/data/4c1e5e7da/f5db27a718634d51aff61b3d19bfc9a6 [2023-11-24 23:21:49,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:21:49,269 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:21:49,273 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:21:49,273 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:21:49,279 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:21:49,279 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,281 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1290875e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49, skipping insertion in model container [2023-11-24 23:21:49,281 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,345 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:21:49,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:21:49,750 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:21:49,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:21:49,855 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:21:49,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49 WrapperNode [2023-11-24 23:21:49,856 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:21:49,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:21:49,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:21:49,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:21:49,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,901 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,933 INFO L138 Inliner]: procedures = 123, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 64 [2023-11-24 23:21:49,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:21:49,934 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:21:49,934 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:21:49,935 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:21:49,945 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,948 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,948 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,975 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,977 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,979 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,987 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:21:49,989 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:21:49,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:21:49,990 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:21:49,991 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (1/1) ... [2023-11-24 23:21:49,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:21:50,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:50,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:21:50,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:21:50,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:21:50,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:21:50,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:21:50,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:21:50,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:21:50,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:21:50,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:21:50,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:21:50,230 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:21:50,241 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:21:50,569 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:21:50,633 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:21:50,634 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:21:50,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:21:50 BoogieIcfgContainer [2023-11-24 23:21:50,636 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:21:50,640 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:21:50,640 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:21:50,644 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:21:50,645 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:21:49" (1/3) ... [2023-11-24 23:21:50,646 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af0ded6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:21:50, skipping insertion in model container [2023-11-24 23:21:50,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:49" (2/3) ... [2023-11-24 23:21:50,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af0ded6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:21:50, skipping insertion in model container [2023-11-24 23:21:50,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:21:50" (3/3) ... [2023-11-24 23:21:50,651 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer.i [2023-11-24 23:21:50,673 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:21:50,673 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-11-24 23:21:50,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:21:50,729 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;@299fc219, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:21:50,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-11-24 23:21:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-24 23:21:50,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:50,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-24 23:21:50,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:21:50,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash 3817, now seen corresponding path program 1 times [2023-11-24 23:21:50,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:50,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011173210] [2023-11-24 23:21:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:50,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:50,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:50,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011173210] [2023-11-24 23:21:50,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011173210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:50,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:50,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:21:50,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639406744] [2023-11-24 23:21:50,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:50,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:51,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:51,033 INFO L87 Difference]: Start difference. First operand has 52 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:51,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:51,163 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2023-11-24 23:21:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:51,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-24 23:21:51,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:51,174 INFO L225 Difference]: With dead ends: 53 [2023-11-24 23:21:51,175 INFO L226 Difference]: Without dead ends: 52 [2023-11-24 23:21:51,177 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 [2023-11-24 23:21:51,180 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:51,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 20 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-24 23:21:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2023-11-24 23:21:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-11-24 23:21:51,218 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 2 [2023-11-24 23:21:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:51,218 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-11-24 23:21:51,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-11-24 23:21:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-24 23:21:51,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:51,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-24 23:21:51,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:21:51,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:21:51,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:51,221 INFO L85 PathProgramCache]: Analyzing trace with hash 3818, now seen corresponding path program 1 times [2023-11-24 23:21:51,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:51,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331413553] [2023-11-24 23:21:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:51,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:51,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:51,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331413553] [2023-11-24 23:21:51,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331413553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:51,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:51,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:21:51,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832078429] [2023-11-24 23:21:51,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:51,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:51,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:51,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:51,353 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:51,447 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-11-24 23:21:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-24 23:21:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:51,449 INFO L225 Difference]: With dead ends: 48 [2023-11-24 23:21:51,449 INFO L226 Difference]: Without dead ends: 48 [2023-11-24 23:21:51,450 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 [2023-11-24 23:21:51,451 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:51,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-24 23:21:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-11-24 23:21:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-24 23:21:51,459 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 2 [2023-11-24 23:21:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:51,460 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-24 23:21:51,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:51,461 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-24 23:21:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:21:51,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:51,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:51,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:21:51,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:21:51,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1755111654, now seen corresponding path program 1 times [2023-11-24 23:21:51,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:51,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703355306] [2023-11-24 23:21:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:51,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:51,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:51,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703355306] [2023-11-24 23:21:51,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703355306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:51,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:51,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:21:51,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318098050] [2023-11-24 23:21:51,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:51,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:21:51,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:21:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:21:51,636 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:51,732 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2023-11-24 23:21:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:21:51,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:21:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:51,735 INFO L225 Difference]: With dead ends: 69 [2023-11-24 23:21:51,735 INFO L226 Difference]: Without dead ends: 69 [2023-11-24 23:21:51,735 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 [2023-11-24 23:21:51,737 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:51,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:51,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-24 23:21:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2023-11-24 23:21:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-11-24 23:21:51,745 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 8 [2023-11-24 23:21:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:51,746 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-11-24 23:21:51,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-11-24 23:21:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:21:51,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:51,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:51,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:21:51,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:21:51,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1755113050, now seen corresponding path program 1 times [2023-11-24 23:21:51,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:51,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090272749] [2023-11-24 23:21:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:51,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:51,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:51,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090272749] [2023-11-24 23:21:51,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090272749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:51,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:51,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:21:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749528097] [2023-11-24 23:21:51,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:21:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:51,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:21:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:21:51,914 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:52,005 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2023-11-24 23:21:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:21:52,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:21:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:52,007 INFO L225 Difference]: With dead ends: 48 [2023-11-24 23:21:52,007 INFO L226 Difference]: Without dead ends: 48 [2023-11-24 23:21:52,007 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 [2023-11-24 23:21:52,009 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:52,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:52,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-24 23:21:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-11-24 23:21:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.7) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-11-24 23:21:52,016 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 8 [2023-11-24 23:21:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:52,016 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-11-24 23:21:52,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-11-24 23:21:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:21:52,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:52,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:52,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:21:52,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:21:52,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1755113049, now seen corresponding path program 1 times [2023-11-24 23:21:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:52,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149317703] [2023-11-24 23:21:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:52,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:52,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:52,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149317703] [2023-11-24 23:21:52,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149317703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:52,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:52,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:21:52,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196053425] [2023-11-24 23:21:52,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:52,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:21:52,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:21:52,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:21:52,263 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:52,416 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2023-11-24 23:21:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:21:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:21:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:52,420 INFO L225 Difference]: With dead ends: 74 [2023-11-24 23:21:52,421 INFO L226 Difference]: Without dead ends: 74 [2023-11-24 23:21:52,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:52,428 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:52,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 40 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-24 23:21:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2023-11-24 23:21:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-11-24 23:21:52,443 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 8 [2023-11-24 23:21:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:52,443 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-11-24 23:21:52,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-11-24 23:21:52,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 23:21:52,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:52,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:52,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:21:52,445 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:21:52,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:52,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1259464461, now seen corresponding path program 1 times [2023-11-24 23:21:52,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:52,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935363342] [2023-11-24 23:21:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:52,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:52,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:52,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935363342] [2023-11-24 23:21:52,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935363342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:52,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:52,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:21:52,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356187672] [2023-11-24 23:21:52,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:52,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:21:52,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:21:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:21:52,666 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:52,731 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2023-11-24 23:21:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:52,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-24 23:21:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:52,733 INFO L225 Difference]: With dead ends: 58 [2023-11-24 23:21:52,734 INFO L226 Difference]: Without dead ends: 58 [2023-11-24 23:21:52,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:21:52,735 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:52,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-24 23:21:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-24 23:21:52,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-11-24 23:21:52,742 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 10 [2023-11-24 23:21:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:52,742 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-11-24 23:21:52,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:52,743 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-11-24 23:21:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:21:52,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:52,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:52,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:21:52,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:21:52,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1719329260, now seen corresponding path program 1 times [2023-11-24 23:21:52,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:52,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141657028] [2023-11-24 23:21:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:52,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:53,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:53,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141657028] [2023-11-24 23:21:53,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141657028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:53,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:53,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:21:53,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611521135] [2023-11-24 23:21:53,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:53,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:21:53,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:21:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:21:53,135 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:53,322 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2023-11-24 23:21:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:21:53,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 23:21:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:53,324 INFO L225 Difference]: With dead ends: 63 [2023-11-24 23:21:53,324 INFO L226 Difference]: Without dead ends: 63 [2023-11-24 23:21:53,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:21:53,325 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:53,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 69 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-24 23:21:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2023-11-24 23:21:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.525) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2023-11-24 23:21:53,340 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 12 [2023-11-24 23:21:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:53,341 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2023-11-24 23:21:53,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2023-11-24 23:21:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:21:53,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:53,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:53,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:21:53,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:21:53,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1719318275, now seen corresponding path program 1 times [2023-11-24 23:21:53,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:53,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868522172] [2023-11-24 23:21:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:53,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:53,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:53,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868522172] [2023-11-24 23:21:53,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868522172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:53,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:53,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:21:53,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205425461] [2023-11-24 23:21:53,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:53,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:21:53,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:21:53,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:21:53,441 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:53,521 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2023-11-24 23:21:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:21:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 23:21:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:53,523 INFO L225 Difference]: With dead ends: 69 [2023-11-24 23:21:53,523 INFO L226 Difference]: Without dead ends: 69 [2023-11-24 23:21:53,523 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 [2023-11-24 23:21:53,525 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:53,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-24 23:21:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2023-11-24 23:21:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 61 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2023-11-24 23:21:53,544 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 12 [2023-11-24 23:21:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:53,544 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2023-11-24 23:21:53,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2023-11-24 23:21:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:21:53,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:53,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:53,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:21:53,549 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:21:53,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:53,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1569353290, now seen corresponding path program 1 times [2023-11-24 23:21:53,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:53,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059888778] [2023-11-24 23:21:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:53,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:53,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:53,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059888778] [2023-11-24 23:21:53,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059888778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:21:53,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670243951] [2023-11-24 23:21:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:53,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:53,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:53,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:21:53,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:21:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:53,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 23:21:53,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:21:53,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 23:21:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:53,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:21:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:54,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670243951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:21:54,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249777450] [2023-11-24 23:21:54,031 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:21:54,031 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:21:54,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:21:54,041 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:21:54,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:21:54,818 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:21:58,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1249777450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:58,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:21:58,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 13 [2023-11-24 23:21:58,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353854617] [2023-11-24 23:21:58,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:58,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 23:21:58,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:58,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 23:21:58,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=152, Unknown=3, NotChecked=0, Total=210 [2023-11-24 23:21:58,186 INFO L87 Difference]: Start difference. First operand 62 states and 77 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) [2023-11-24 23:22:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:00,381 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-11-24 23:22:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:22:00,382 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 15 [2023-11-24 23:22:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:00,384 INFO L225 Difference]: With dead ends: 78 [2023-11-24 23:22:00,384 INFO L226 Difference]: Without dead ends: 64 [2023-11-24 23:22:00,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=55, Invalid=152, Unknown=3, NotChecked=0, Total=210 [2023-11-24 23:22:00,385 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 7 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:00,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 329 Invalid, 7 Unknown, 0 Unchecked, 2.2s Time] [2023-11-24 23:22:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-24 23:22:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-24 23:22:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 63 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-11-24 23:22:00,391 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 15 [2023-11-24 23:22:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:00,391 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-11-24 23:22:00,391 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) [2023-11-24 23:22:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-11-24 23:22:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:22:00,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:00,393 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:00,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 23:22:00,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:22:00,601 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:22:00,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1481435705, now seen corresponding path program 1 times [2023-11-24 23:22:00,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:00,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913427547] [2023-11-24 23:22:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:00,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:00,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:00,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913427547] [2023-11-24 23:22:00,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913427547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:00,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:00,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:22:00,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250858158] [2023-11-24 23:22:00,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:00,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:22:00,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:22:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:22:00,752 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2023-11-24 23:22:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:00,837 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-11-24 23:22:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:22:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 15 [2023-11-24 23:22:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:00,838 INFO L225 Difference]: With dead ends: 72 [2023-11-24 23:22:00,838 INFO L226 Difference]: Without dead ends: 72 [2023-11-24 23:22:00,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:22:00,839 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:00,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 37 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-24 23:22:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2023-11-24 23:22:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-11-24 23:22:00,851 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 15 [2023-11-24 23:22:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:00,851 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-11-24 23:22:00,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2023-11-24 23:22:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-11-24 23:22:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:22:00,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:00,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:00,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:22:00,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:22:00,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:00,854 INFO L85 PathProgramCache]: Analyzing trace with hash -885388748, now seen corresponding path program 1 times [2023-11-24 23:22:00,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:00,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508609514] [2023-11-24 23:22:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:00,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:01,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:01,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508609514] [2023-11-24 23:22:01,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508609514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:01,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:01,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:22:01,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893685940] [2023-11-24 23:22:01,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:01,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:22:01,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:22:01,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:01,291 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:01,461 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-11-24 23:22:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:22:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-24 23:22:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:01,463 INFO L225 Difference]: With dead ends: 76 [2023-11-24 23:22:01,463 INFO L226 Difference]: Without dead ends: 76 [2023-11-24 23:22:01,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:22:01,464 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:01,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 86 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-24 23:22:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2023-11-24 23:22:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.4375) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-11-24 23:22:01,467 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 19 [2023-11-24 23:22:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:01,467 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-11-24 23:22:01,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-11-24 23:22:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:22:01,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:01,469 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:01,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:22:01,470 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:22:01,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1677247311, now seen corresponding path program 1 times [2023-11-24 23:22:01,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:01,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637646227] [2023-11-24 23:22:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:01,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:01,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:01,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637646227] [2023-11-24 23:22:01,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637646227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:01,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:01,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:22:01,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941614929] [2023-11-24 23:22:01,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:01,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:22:01,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:01,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:22:01,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:22:01,835 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:02,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:02,067 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2023-11-24 23:22:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:22:02,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2023-11-24 23:22:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:02,069 INFO L225 Difference]: With dead ends: 75 [2023-11-24 23:22:02,069 INFO L226 Difference]: Without dead ends: 75 [2023-11-24 23:22:02,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:22:02,070 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:02,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 69 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:22:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-24 23:22:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2023-11-24 23:22:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-11-24 23:22:02,073 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 20 [2023-11-24 23:22:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:02,073 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-11-24 23:22:02,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-11-24 23:22:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 23:22:02,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:02,075 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:02,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 23:22:02,075 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:22:02,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash -455058986, now seen corresponding path program 1 times [2023-11-24 23:22:02,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:02,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291061330] [2023-11-24 23:22:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:02,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:02,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:02,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291061330] [2023-11-24 23:22:02,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291061330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:02,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:02,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:22:02,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267286577] [2023-11-24 23:22:02,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:02,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:22:02,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:02,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:22:02,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:02,413 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:02,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:02,593 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-11-24 23:22:02,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:22:02,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-24 23:22:02,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:02,595 INFO L225 Difference]: With dead ends: 61 [2023-11-24 23:22:02,595 INFO L226 Difference]: Without dead ends: 61 [2023-11-24 23:22:02,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:22:02,596 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:02,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 53 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-24 23:22:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-11-24 23:22:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-11-24 23:22:02,599 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 21 [2023-11-24 23:22:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:02,599 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-11-24 23:22:02,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-11-24 23:22:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:22:02,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:02,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:02,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:22:02,601 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:22:02,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash -894661078, now seen corresponding path program 1 times [2023-11-24 23:22:02,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:02,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539480214] [2023-11-24 23:22:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:02,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:02,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:02,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539480214] [2023-11-24 23:22:02,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539480214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:22:02,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058942118] [2023-11-24 23:22:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:02,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:22:02,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:22:02,881 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:22:02,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:22:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:03,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-24 23:22:03,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:22:03,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 23:22:03,068 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 23:22:03,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 23:22:03,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 23:22:03,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:03,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 16 [2023-11-24 23:22:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:03,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:22:03,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058942118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:03,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:22:03,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2023-11-24 23:22:03,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78020501] [2023-11-24 23:22:03,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:03,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:22:03,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:03,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:22:03,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:22:03,200 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2023-11-24 23:22:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:03,462 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2023-11-24 23:22:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:22:03,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) Word has length 22 [2023-11-24 23:22:03,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:03,463 INFO L225 Difference]: With dead ends: 68 [2023-11-24 23:22:03,463 INFO L226 Difference]: Without dead ends: 67 [2023-11-24 23:22:03,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-24 23:22:03,464 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:03,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:03,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-24 23:22:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-11-24 23:22:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.375) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2023-11-24 23:22:03,467 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 22 [2023-11-24 23:22:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:03,468 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2023-11-24 23:22:03,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2023-11-24 23:22:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2023-11-24 23:22:03,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:22:03,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:03,470 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:03,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:22:03,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 23:22:03,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:22:03,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash -88943317, now seen corresponding path program 1 times [2023-11-24 23:22:03,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:03,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402386488] [2023-11-24 23:22:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:03,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:03,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:03,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402386488] [2023-11-24 23:22:03,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402386488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:22:03,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876662295] [2023-11-24 23:22:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:03,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:22:03,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:22:03,950 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:22:03,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:22:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:04,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-24 23:22:04,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:22:04,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 23:22:04,130 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 23:22:04,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 23:22:04,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:22:04,198 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-24 23:22:04,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-11-24 23:22:04,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2023-11-24 23:22:04,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:04,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-24 23:22:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:04,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:22:04,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:04,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-11-24 23:22:04,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:04,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2023-11-24 23:22:04,595 INFO L378 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 20 treesize of output 18 [2023-11-24 23:22:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:04,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876662295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:22:04,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424176536] [2023-11-24 23:22:04,806 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-24 23:22:04,806 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:22:04,807 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:22:04,808 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:22:04,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:22:10,673 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:22:17,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2182#(and (= |ULTIMATE.start_main_~y~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~list~0#1.offset| 0) (or (= |ULTIMATE.start_main_~y~0#1.base| 0) (and (<= 12 (select |#length| |ULTIMATE.start_main_~y~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~y~0#1.base|) 8) 12) (<= (+ |ULTIMATE.start_main_~y~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_67| (Array Int Int)) (|v_ULTIMATE.start_main_~list~0#1.offset_42| Int) (|v_ULTIMATE.start_main_~list~0#1.base_44| Int)) (and (<= (+ 4 |v_ULTIMATE.start_main_~list~0#1.offset_42|) (select |#length| |v_ULTIMATE.start_main_~list~0#1.base_44|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~list~0#1.base_44|) |v_ULTIMATE.start_main_~list~0#1.offset_42|) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~list~0#1.base_44|) |v_ULTIMATE.start_main_~list~0#1.offset_42|) 0) (<= 0 |v_ULTIMATE.start_main_~list~0#1.offset_42|) (= (select |v_#valid_67| |v_ULTIMATE.start_main_~list~0#1.base_44|) 1) (= (select |v_#valid_67| |ULTIMATE.start_main_~y~0#1.base|) 1) (= |#valid| (store |v_#valid_67| |ULTIMATE.start_main_~y~0#1.base| 0)))) (= |ULTIMATE.start_main_~y~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~y~0#1.base|) 8)))) (= |ULTIMATE.start_main_~list~0#1.base| 0) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-11-24 23:22:17,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:22:17,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:22:17,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-11-24 23:22:17,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603512746] [2023-11-24 23:22:17,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:22:17,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 23:22:17,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 23:22:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1371, Unknown=7, NotChecked=0, Total=1560 [2023-11-24 23:22:17,109 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:18,348 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2023-11-24 23:22:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 23:22:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-24 23:22:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:18,350 INFO L225 Difference]: With dead ends: 106 [2023-11-24 23:22:18,350 INFO L226 Difference]: Without dead ends: 106 [2023-11-24 23:22:18,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=542, Invalid=2873, Unknown=7, NotChecked=0, Total=3422 [2023-11-24 23:22:18,353 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 198 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:18,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 115 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:22:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-24 23:22:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 63. [2023-11-24 23:22:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-11-24 23:22:18,356 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 22 [2023-11-24 23:22:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:18,356 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-11-24 23:22:18,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-11-24 23:22:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:22:18,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:18,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:18,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:22:18,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 23:22:18,560 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:22:18,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash -88944713, now seen corresponding path program 1 times [2023-11-24 23:22:18,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:18,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869038410] [2023-11-24 23:22:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:18,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:18,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:18,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869038410] [2023-11-24 23:22:18,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869038410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:22:18,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451571599] [2023-11-24 23:22:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:18,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:22:18,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:22:18,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:22:18,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:22:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:19,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-24 23:22:19,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:22:19,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 23:22:19,045 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 23:22:19,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 23:22:19,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:22:19,118 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-24 23:22:19,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-24 23:22:19,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2023-11-24 23:22:19,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:19,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2023-11-24 23:22:19,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 23:22:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:19,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:22:19,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:19,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 49 [2023-11-24 23:22:19,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:19,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-11-24 23:22:19,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:19,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2023-11-24 23:22:19,923 INFO L378 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 20 treesize of output 18 [2023-11-24 23:22:19,953 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 23:22:19,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 23:22:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:20,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451571599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:22:20,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1826197120] [2023-11-24 23:22:20,045 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-24 23:22:20,045 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:22:20,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:22:20,046 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:22:20,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:22:25,701 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:22:26,572 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~y~0#1.offset| 0) (= |c_ULTIMATE.start_main_~list~0#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_main_#t~nondet6#1| 2147483647) (<= 0 (+ |c_ULTIMATE.start_main_#t~nondet6#1| 2147483648)) (let ((.cse1 (= (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|) 1)) (.cse3 (<= (+ |c_ULTIMATE.start_main_~y~0#1.base| 1) |c_#StackHeapBarrier|)) (.cse2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) 4)) (.cse4 (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~y~0#1.base|))) (.cse6 (<= 8 (select |c_#length| |c_ULTIMATE.start_main_~list~0#1.base|))) (.cse7 (not (= |c_ULTIMATE.start_main_~y~0#1.base| 0))) (.cse8 (= (select |c_#valid| |c_ULTIMATE.start_main_~y~0#1.base|) 1))) (or (and (exists ((|v_#memory_$Pointer$.offset_76| (Array Int (Array Int Int)))) (= (let ((.cse0 (store |v_#memory_$Pointer$.offset_76| |c_ULTIMATE.start_main_~y~0#1.base| (store (select |v_#memory_$Pointer$.offset_76| |c_ULTIMATE.start_main_~y~0#1.base|) 0 0)))) (store .cse0 |c_ULTIMATE.start_main_~list~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~list~0#1.base|) 4 0))) |c_#memory_$Pointer$.offset|)) .cse1 (exists ((|v_#memory_int_74| (Array Int (Array Int Int))) (|v_#memory_int_75| (Array Int (Array Int Int)))) (and (= |v_#memory_int_75| (store |v_#memory_int_74| |c_ULTIMATE.start_main_~y~0#1.base| (store (select |v_#memory_int_74| |c_ULTIMATE.start_main_~y~0#1.base|) 0 (select (select |v_#memory_int_75| |c_ULTIMATE.start_main_~y~0#1.base|) 0)))) (= (store |v_#memory_int_75| |c_ULTIMATE.start_main_~list~0#1.base| (store (select |v_#memory_int_75| |c_ULTIMATE.start_main_~list~0#1.base|) 4 .cse2)) |c_#memory_int|))) (exists ((|v_#valid_80| (Array Int Int))) (and (= (select |v_#valid_80| |c_ULTIMATE.start_main_~y~0#1.base|) 0) (= |c_#valid| (store |v_#valid_80| |c_ULTIMATE.start_main_~y~0#1.base| 1)))) .cse3 (exists ((|v_#length_52| (Array Int Int))) (= |c_#length| (store |v_#length_52| |c_ULTIMATE.start_main_~y~0#1.base| 13))) .cse4 (exists ((|v_#memory_$Pointer$.base_83| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.base| (let ((.cse5 (store |v_#memory_$Pointer$.base_83| |c_ULTIMATE.start_main_~y~0#1.base| (store (select |v_#memory_$Pointer$.base_83| |c_ULTIMATE.start_main_~y~0#1.base|) 0 |c_ULTIMATE.start_main_~list~0#1.base|)))) (store .cse5 |c_ULTIMATE.start_main_~list~0#1.base| (store (select .cse5 |c_ULTIMATE.start_main_~list~0#1.base|) 4 |c_ULTIMATE.start_main_~y~0#1.base|))))) .cse6 .cse7 .cse8 (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_27| Int)) (and (not (= |v_ULTIMATE.start_main_#t~nondet4#1_27| 0)) (<= |v_ULTIMATE.start_main_#t~nondet4#1_27| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_27| 2147483648))))) (let ((.cse14 (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_main_~list~0#1.base| 1))) (and .cse1 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.base_71| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.base| (let ((.cse10 (store |v_#memory_$Pointer$.base_71| |c_ULTIMATE.start_main_~list~0#1.base| (store (store (store (select |v_#memory_$Pointer$.base_71| |c_ULTIMATE.start_main_~list~0#1.base|) 0 0) 4 0) 8 |c_ULTIMATE.start_main_~list~0#1.base|)))) (let ((.cse9 (store (select .cse10 |c_ULTIMATE.start_main_~y~0#1.base|) 0 |c_ULTIMATE.start_main_~list~0#1.base|))) (store (store |v_#memory_$Pointer$.base_71| |c_ULTIMATE.start_main_~y~0#1.base| .cse9) |c_ULTIMATE.start_main_~list~0#1.base| (store (select (store .cse10 |c_ULTIMATE.start_main_~y~0#1.base| .cse9) |c_ULTIMATE.start_main_~list~0#1.base|) 4 |c_ULTIMATE.start_main_~y~0#1.base|)))))) .cse3 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1) (<= (+ |c_ULTIMATE.start_main_~list~0#1.base| 1) |c_#StackHeapBarrier|) (exists ((|v_#memory_int_62| (Array Int (Array Int Int))) (|v_#memory_int_63| (Array Int (Array Int Int))) (|v_#memory_int_64| (Array Int (Array Int Int))) (|v_#memory_int_65| (Array Int (Array Int Int))) (|v_#memory_int_66| (Array Int (Array Int Int)))) (let ((.cse11 (select |v_#memory_int_62| 1)) (.cse13 (select |v_#memory_int_64| |c_ULTIMATE.start_main_~list~0#1.base|)) (.cse12 (select |v_#memory_int_63| |c_ULTIMATE.start_main_~list~0#1.base|))) (and (= (select .cse11 1) 0) (= (select .cse11 0) 48) (= |v_#memory_int_64| (store |v_#memory_int_63| |c_ULTIMATE.start_main_~list~0#1.base| (store .cse12 4 (select .cse13 4)))) (= (store |v_#memory_int_64| |c_ULTIMATE.start_main_~list~0#1.base| (store .cse13 8 (select (select |v_#memory_int_65| |c_ULTIMATE.start_main_~list~0#1.base|) 8))) |v_#memory_int_65|) (= |v_#memory_int_63| (store |v_#memory_int_62| |c_ULTIMATE.start_main_~list~0#1.base| (store (select |v_#memory_int_62| |c_ULTIMATE.start_main_~list~0#1.base|) 0 (select .cse12 0)))) (= (store |v_#memory_int_66| |c_ULTIMATE.start_main_~list~0#1.base| (store (select |v_#memory_int_66| |c_ULTIMATE.start_main_~list~0#1.base|) 4 .cse2)) |c_#memory_int|) (= (store |v_#memory_int_65| |c_ULTIMATE.start_main_~y~0#1.base| (store (select |v_#memory_int_65| |c_ULTIMATE.start_main_~y~0#1.base|) 0 (select (select |v_#memory_int_66| |c_ULTIMATE.start_main_~y~0#1.base|) 0))) |v_#memory_int_66|)))) (= (select .cse14 |c_ULTIMATE.start_main_~y~0#1.base|) 0) .cse4 (not (= |c_ULTIMATE.start_main_~list~0#1.base| 0)) .cse6 .cse7 (= |c_#valid| (store .cse14 |c_ULTIMATE.start_main_~y~0#1.base| 1)) (exists ((|v_#length_48| (Array Int Int))) (and (= (store (store |v_#length_48| |c_ULTIMATE.start_main_~list~0#1.base| 13) |c_ULTIMATE.start_main_~y~0#1.base| 13) |c_#length|) (= (select |v_#length_48| 2) 22) (= (select |v_#length_48| 1) 2))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_main_~list~0#1.base|) 0) .cse8 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1) (exists ((|v_#memory_$Pointer$.offset_64| (Array Int (Array Int Int)))) (= (let ((.cse16 (store |v_#memory_$Pointer$.offset_64| |c_ULTIMATE.start_main_~list~0#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_64| |c_ULTIMATE.start_main_~list~0#1.base|) 0 0) 4 0) 8 12)))) (let ((.cse15 (store (select .cse16 |c_ULTIMATE.start_main_~y~0#1.base|) 0 0))) (store (store |v_#memory_$Pointer$.offset_64| |c_ULTIMATE.start_main_~y~0#1.base| .cse15) |c_ULTIMATE.start_main_~list~0#1.base| (store (select (store .cse16 |c_ULTIMATE.start_main_~y~0#1.base| .cse15) |c_ULTIMATE.start_main_~list~0#1.base|) 4 0)))) |c_#memory_$Pointer$.offset|)) (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_23| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_23| 2147483648)) (not (= |v_ULTIMATE.start_main_#t~nondet4#1_23| 0)) (<= |v_ULTIMATE.start_main_#t~nondet4#1_23| 2147483647)))))))) is different from true [2023-11-24 23:22:29,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2557#(and (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_main_~list~0#1.base|) 1)))' at error location [2023-11-24 23:22:29,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:22:29,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:22:29,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-24 23:22:29,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517804744] [2023-11-24 23:22:29,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:22:29,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 23:22:29,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 23:22:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1366, Unknown=6, NotChecked=76, Total=1640 [2023-11-24 23:22:29,437 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:30,904 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2023-11-24 23:22:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 23:22:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-24 23:22:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:30,906 INFO L225 Difference]: With dead ends: 85 [2023-11-24 23:22:30,906 INFO L226 Difference]: Without dead ends: 85 [2023-11-24 23:22:30,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=557, Invalid=2863, Unknown=6, NotChecked=114, Total=3540 [2023-11-24 23:22:30,909 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 143 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:30,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 144 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:22:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-24 23:22:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2023-11-24 23:22:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2023-11-24 23:22:30,912 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 22 [2023-11-24 23:22:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:30,913 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2023-11-24 23:22:30,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2023-11-24 23:22:30,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:22:30,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:30,914 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:30,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:22:31,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 23:22:31,120 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 23:22:31,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:31,120 INFO L85 PathProgramCache]: Analyzing trace with hash -88944712, now seen corresponding path program 1 times [2023-11-24 23:22:31,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:31,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061317125] [2023-11-24 23:22:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:31,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:31,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:31,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061317125] [2023-11-24 23:22:31,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061317125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:22:31,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184513481] [2023-11-24 23:22:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:31,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:22:31,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:22:31,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:22:31,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_255def6a-af4e-4d80-ac4a-c493841084b5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:22:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:31,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 23:22:31,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:22:31,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 23:22:31,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 23:22:31,790 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 23:22:31,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-24 23:22:31,811 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 23:22:31,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 23:22:31,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:22:31,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:22:31,910 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-24 23:22:31,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-24 23:22:31,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-24 23:22:31,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2023-11-24 23:22:31,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-24 23:22:32,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-24 23:22:32,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2023-11-24 23:22:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:32,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:22:32,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:32,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-11-24 23:22:32,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:32,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-11-24 23:22:32,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:32,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2023-11-24 23:22:32,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:32,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2023-11-24 23:22:32,783 INFO L378 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 15 treesize of output 13 [2023-11-24 23:22:32,790 INFO L378 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 13 treesize of output 11 [2023-11-24 23:22:32,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:22:32,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-11-24 23:22:32,838 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:22:32,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:22:32,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-24 23:22:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:33,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184513481] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:22:33,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987376584] [2023-11-24 23:22:33,141 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-24 23:22:33,141 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:22:33,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:22:33,142 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:22:33,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:22:38,609 INFO L180 IcfgInterpreter]: Interpretation finished