./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-sorted-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/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_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-sorted-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/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_27561099-2bab-4730-95eb-059cbf22992a/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 97c87a4be2f33468a224d89594f96c367f5837bb79771cd5155d22e1299d7831 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:08:53,568 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:08:53,648 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-25 00:08:53,655 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:08:53,655 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:08:53,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:08:53,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:08:53,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:08:53,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:08:53,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:08:53,695 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:08:53,695 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:08:53,696 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:08:53,701 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:08:53,701 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:08:53,702 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:08:53,702 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:08:53,703 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:08:53,703 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:08:53,704 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:08:53,704 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:08:53,705 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:08:53,705 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-25 00:08:53,706 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-25 00:08:53,707 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:08:53,707 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:08:53,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:08:53,708 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:08:53,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:08:53,709 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-25 00:08:53,710 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-25 00:08:53,711 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-25 00:08:53,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:08:53,712 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-25 00:08:53,712 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:08:53,712 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:08:53,712 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:08:53,713 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:08:53,713 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:08:53,713 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:08:53,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:53,714 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:08:53,714 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:08:53,715 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:08:53,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:08:53,715 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:08:53,716 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:08:53,716 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:08:53,716 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_27561099-2bab-4730-95eb-059cbf22992a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97c87a4be2f33468a224d89594f96c367f5837bb79771cd5155d22e1299d7831 [2023-11-25 00:08:54,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:08:54,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:08:54,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:08:54,080 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:08:54,081 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:08:54,082 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/forester-heap/dll-sorted-2.i [2023-11-25 00:08:57,164 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:08:57,428 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:08:57,428 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/sv-benchmarks/c/forester-heap/dll-sorted-2.i [2023-11-25 00:08:57,457 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/data/c035d0654/af8a1c7766474e9d99390554deb1ff74/FLAG50b3003c9 [2023-11-25 00:08:57,471 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/data/c035d0654/af8a1c7766474e9d99390554deb1ff74 [2023-11-25 00:08:57,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:08:57,476 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:08:57,477 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:57,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:08:57,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:08:57,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:57" (1/1) ... [2023-11-25 00:08:57,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67c960c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:57, skipping insertion in model container [2023-11-25 00:08:57,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:57" (1/1) ... [2023-11-25 00:08:57,557 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:08:57,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:57,963 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:08:58,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:58,055 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:08:58,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58 WrapperNode [2023-11-25 00:08:58,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:58,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:58,057 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:08:58,079 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:08:58,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,101 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,151 INFO L138 Inliner]: procedures = 119, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 199 [2023-11-25 00:08:58,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:58,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:08:58,153 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:08:58,153 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:08:58,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,197 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,210 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,216 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:08:58,217 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:08:58,217 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:08:58,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:08:58,218 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (1/1) ... [2023-11-25 00:08:58,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:58,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:08:58,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:08:58,309 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-25 00:08:58,309 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-25 00:08:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:08:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:08:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:08:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:08:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:08:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:08:58,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:08:58,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:08:58,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:08:58,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:08:58,436 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:08:58,440 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:08:58,979 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:08:59,100 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:08:59,100 INFO L309 CfgBuilder]: Removed 18 assume(true) statements. [2023-11-25 00:08:59,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:59 BoogieIcfgContainer [2023-11-25 00:08:59,103 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:08:59,109 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:08:59,109 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:08:59,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:08:59,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:08:57" (1/3) ... [2023-11-25 00:08:59,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281aa1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:59, skipping insertion in model container [2023-11-25 00:08:59,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:58" (2/3) ... [2023-11-25 00:08:59,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281aa1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:59, skipping insertion in model container [2023-11-25 00:08:59,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:59" (3/3) ... [2023-11-25 00:08:59,120 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-sorted-2.i [2023-11-25 00:08:59,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:08:59,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 75 error locations. [2023-11-25 00:08:59,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:08:59,222 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;@3cf50fe8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:08:59,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-11-25 00:08:59,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 77 states have (on average 2.4025974025974026) internal successors, (185), 152 states have internal predecessors, (185), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-25 00:08:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-25 00:08:59,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:59,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-25 00:08:59,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:08:59,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:59,242 INFO L85 PathProgramCache]: Analyzing trace with hash 13219, now seen corresponding path program 1 times [2023-11-25 00:08:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:59,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675676134] [2023-11-25 00:08:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:59,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:08:59,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675676134] [2023-11-25 00:08:59,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675676134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:59,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:59,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-25 00:08:59,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219127070] [2023-11-25 00:08:59,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:59,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:59,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:59,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:08:59,674 INFO L87 Difference]: Start difference. First operand has 160 states, 77 states have (on average 2.4025974025974026) internal successors, (185), 152 states have internal predecessors, (185), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2023-11-25 00:08:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:59,929 INFO L93 Difference]: Finished difference Result 152 states and 167 transitions. [2023-11-25 00:08:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:59,932 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 [2023-11-25 00:08:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:59,944 INFO L225 Difference]: With dead ends: 152 [2023-11-25 00:08:59,945 INFO L226 Difference]: Without dead ends: 151 [2023-11-25 00:08:59,947 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 [2023-11-25 00:08:59,952 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 141 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:59,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 90 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:08:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-25 00:09:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2023-11-25 00:09:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 70 states have (on average 2.2285714285714286) internal successors, (156), 146 states have internal predecessors, (156), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2023-11-25 00:09:00,010 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 2 [2023-11-25 00:09:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:00,011 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2023-11-25 00:09:00,011 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) [2023-11-25 00:09:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2023-11-25 00:09:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-25 00:09:00,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:00,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-25 00:09:00,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:09:00,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:09:00,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash 13220, now seen corresponding path program 1 times [2023-11-25 00:09:00,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:00,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452527643] [2023-11-25 00:09:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:00,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:00,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:00,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452527643] [2023-11-25 00:09:00,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452527643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:00,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:00,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-25 00:09:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827271879] [2023-11-25 00:09:00,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:00,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:09:00,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:09:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:09:00,128 INFO L87 Difference]: Start difference. First operand 148 states and 162 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) [2023-11-25 00:09:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:00,279 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2023-11-25 00:09:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:09:00,280 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 [2023-11-25 00:09:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:00,282 INFO L225 Difference]: With dead ends: 148 [2023-11-25 00:09:00,282 INFO L226 Difference]: Without dead ends: 148 [2023-11-25 00:09:00,282 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 [2023-11-25 00:09:00,284 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 138 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:00,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 90 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:09:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-25 00:09:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2023-11-25 00:09:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 143 states have internal predecessors, (153), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 159 transitions. [2023-11-25 00:09:00,296 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 159 transitions. Word has length 2 [2023-11-25 00:09:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:00,297 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 159 transitions. [2023-11-25 00:09:00,297 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) [2023-11-25 00:09:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 159 transitions. [2023-11-25 00:09:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-25 00:09:00,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:00,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:00,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:09:00,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:09:00,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash 488403782, now seen corresponding path program 1 times [2023-11-25 00:09:00,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:00,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258084793] [2023-11-25 00:09:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:00,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:00,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:00,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258084793] [2023-11-25 00:09:00,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258084793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:00,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:00,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:09:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546926080] [2023-11-25 00:09:00,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:00,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:09:00,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:09:00,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:09:00,557 INFO L87 Difference]: Start difference. First operand 145 states and 159 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:00,829 INFO L93 Difference]: Finished difference Result 149 states and 166 transitions. [2023-11-25 00:09:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:09:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-25 00:09:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:00,833 INFO L225 Difference]: With dead ends: 149 [2023-11-25 00:09:00,834 INFO L226 Difference]: Without dead ends: 149 [2023-11-25 00:09:00,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:09:00,842 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 239 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:00,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 67 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:09:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-25 00:09:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 140. [2023-11-25 00:09:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 138 states have internal predecessors, (159), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2023-11-25 00:09:00,857 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 7 [2023-11-25 00:09:00,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:00,860 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2023-11-25 00:09:00,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2023-11-25 00:09:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-25 00:09:00,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:00,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:00,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:09:00,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:09:00,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:00,863 INFO L85 PathProgramCache]: Analyzing trace with hash 488403783, now seen corresponding path program 1 times [2023-11-25 00:09:00,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:00,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280633914] [2023-11-25 00:09:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:01,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:01,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280633914] [2023-11-25 00:09:01,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280633914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:01,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:01,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:09:01,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922135024] [2023-11-25 00:09:01,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:01,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:09:01,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:01,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:09:01,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:09:01,205 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:01,630 INFO L93 Difference]: Finished difference Result 204 states and 236 transitions. [2023-11-25 00:09:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:09:01,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-25 00:09:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:01,632 INFO L225 Difference]: With dead ends: 204 [2023-11-25 00:09:01,632 INFO L226 Difference]: Without dead ends: 204 [2023-11-25 00:09:01,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:09:01,634 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 450 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:01,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 130 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:09:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-25 00:09:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 182. [2023-11-25 00:09:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 125 states have (on average 1.784) internal successors, (223), 180 states have internal predecessors, (223), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 229 transitions. [2023-11-25 00:09:01,648 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 229 transitions. Word has length 7 [2023-11-25 00:09:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:01,648 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 229 transitions. [2023-11-25 00:09:01,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 229 transitions. [2023-11-25 00:09:01,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-25 00:09:01,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:01,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:01,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:09:01,650 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:09:01,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1204949237, now seen corresponding path program 1 times [2023-11-25 00:09:01,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:01,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984357506] [2023-11-25 00:09:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:01,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:01,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:01,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984357506] [2023-11-25 00:09:01,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984357506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:01,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:01,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:09:01,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490537207] [2023-11-25 00:09:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:01,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:09:01,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:01,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:09:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:09:01,826 INFO L87 Difference]: Start difference. First operand 182 states and 229 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:02,049 INFO L93 Difference]: Finished difference Result 181 states and 227 transitions. [2023-11-25 00:09:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:09:02,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-25 00:09:02,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:02,052 INFO L225 Difference]: With dead ends: 181 [2023-11-25 00:09:02,052 INFO L226 Difference]: Without dead ends: 181 [2023-11-25 00:09:02,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:09:02,056 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 6 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:02,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 327 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:09:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-25 00:09:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-25 00:09:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 125 states have (on average 1.768) internal successors, (221), 179 states have internal predecessors, (221), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 227 transitions. [2023-11-25 00:09:02,069 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 227 transitions. Word has length 9 [2023-11-25 00:09:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:02,069 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 227 transitions. [2023-11-25 00:09:02,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 227 transitions. [2023-11-25 00:09:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-25 00:09:02,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:02,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:02,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:09:02,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:09:02,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:02,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1204949238, now seen corresponding path program 1 times [2023-11-25 00:09:02,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:02,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602152056] [2023-11-25 00:09:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:02,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:02,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:02,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602152056] [2023-11-25 00:09:02,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602152056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:02,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:02,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:09:02,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630085766] [2023-11-25 00:09:02,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:02,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:09:02,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:09:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:09:02,287 INFO L87 Difference]: Start difference. First operand 181 states and 227 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:02,520 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2023-11-25 00:09:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:09:02,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-25 00:09:02,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:02,522 INFO L225 Difference]: With dead ends: 180 [2023-11-25 00:09:02,522 INFO L226 Difference]: Without dead ends: 180 [2023-11-25 00:09:02,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:09:02,523 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 3 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:02,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 305 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:09:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-25 00:09:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-25 00:09:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 125 states have (on average 1.752) internal successors, (219), 178 states have internal predecessors, (219), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 225 transitions. [2023-11-25 00:09:02,531 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 225 transitions. Word has length 9 [2023-11-25 00:09:02,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:02,532 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 225 transitions. [2023-11-25 00:09:02,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 225 transitions. [2023-11-25 00:09:02,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-25 00:09:02,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:02,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:02,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:09:02,533 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:09:02,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:02,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2039868593, now seen corresponding path program 1 times [2023-11-25 00:09:02,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:02,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800837630] [2023-11-25 00:09:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:02,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:02,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:02,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800837630] [2023-11-25 00:09:02,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800837630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:02,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:02,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:09:02,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332364180] [2023-11-25 00:09:02,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:02,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:09:02,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:09:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:09:02,564 INFO L87 Difference]: Start difference. First operand 180 states and 225 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:02,622 INFO L93 Difference]: Finished difference Result 213 states and 261 transitions. [2023-11-25 00:09:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:09:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-25 00:09:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:02,624 INFO L225 Difference]: With dead ends: 213 [2023-11-25 00:09:02,624 INFO L226 Difference]: Without dead ends: 213 [2023-11-25 00:09:02,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:09:02,625 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 95 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:02,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 167 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:09:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-25 00:09:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 182. [2023-11-25 00:09:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 127 states have (on average 1.7322834645669292) internal successors, (220), 180 states have internal predecessors, (220), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 226 transitions. [2023-11-25 00:09:02,632 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 226 transitions. Word has length 11 [2023-11-25 00:09:02,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:02,632 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 226 transitions. [2023-11-25 00:09:02,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 226 transitions. [2023-11-25 00:09:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-25 00:09:02,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:02,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:02,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:09:02,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:09:02,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:02,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1684616548, now seen corresponding path program 1 times [2023-11-25 00:09:02,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:02,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664982673] [2023-11-25 00:09:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:02,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:02,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:02,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664982673] [2023-11-25 00:09:02,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664982673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:02,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:02,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:09:02,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803899911] [2023-11-25 00:09:02,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:02,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:09:02,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:09:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:09:02,892 INFO L87 Difference]: Start difference. First operand 182 states and 226 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:03,282 INFO L93 Difference]: Finished difference Result 187 states and 226 transitions. [2023-11-25 00:09:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:09:03,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-25 00:09:03,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:03,285 INFO L225 Difference]: With dead ends: 187 [2023-11-25 00:09:03,285 INFO L226 Difference]: Without dead ends: 187 [2023-11-25 00:09:03,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:09:03,286 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 232 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:03,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 199 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:09:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-25 00:09:03,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2023-11-25 00:09:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 127 states have (on average 1.7244094488188977) internal successors, (219), 179 states have internal predecessors, (219), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 225 transitions. [2023-11-25 00:09:03,292 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 225 transitions. Word has length 11 [2023-11-25 00:09:03,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:03,292 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 225 transitions. [2023-11-25 00:09:03,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 225 transitions. [2023-11-25 00:09:03,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-25 00:09:03,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:03,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:03,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:09:03,294 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:09:03,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:03,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1684616547, now seen corresponding path program 1 times [2023-11-25 00:09:03,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:03,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169649820] [2023-11-25 00:09:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:03,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:03,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:03,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169649820] [2023-11-25 00:09:03,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169649820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:03,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:03,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:09:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924970565] [2023-11-25 00:09:03,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:03,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:09:03,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:03,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:09:03,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:09:03,676 INFO L87 Difference]: Start difference. First operand 181 states and 225 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:04,315 INFO L93 Difference]: Finished difference Result 181 states and 220 transitions. [2023-11-25 00:09:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-25 00:09:04,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-25 00:09:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:04,318 INFO L225 Difference]: With dead ends: 181 [2023-11-25 00:09:04,319 INFO L226 Difference]: Without dead ends: 181 [2023-11-25 00:09:04,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-11-25 00:09:04,320 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 226 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:04,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 292 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:09:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-25 00:09:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2023-11-25 00:09:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 121 states have (on average 1.7107438016528926) internal successors, (207), 167 states have internal predecessors, (207), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 213 transitions. [2023-11-25 00:09:04,327 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 213 transitions. Word has length 11 [2023-11-25 00:09:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:04,328 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 213 transitions. [2023-11-25 00:09:04,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 213 transitions. [2023-11-25 00:09:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-25 00:09:04,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:04,329 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:04,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:09:04,330 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:09:04,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1395079164, now seen corresponding path program 1 times [2023-11-25 00:09:04,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:04,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884484984] [2023-11-25 00:09:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:04,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:09:04,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:04,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884484984] [2023-11-25 00:09:04,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884484984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:04,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:04,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:09:04,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528577259] [2023-11-25 00:09:04,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:04,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:09:04,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:04,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:09:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:09:04,427 INFO L87 Difference]: Start difference. First operand 169 states and 213 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:04,584 INFO L93 Difference]: Finished difference Result 196 states and 223 transitions. [2023-11-25 00:09:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:09:04,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-25 00:09:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:04,586 INFO L225 Difference]: With dead ends: 196 [2023-11-25 00:09:04,586 INFO L226 Difference]: Without dead ends: 196 [2023-11-25 00:09:04,586 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 [2023-11-25 00:09:04,587 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 235 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:04,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 158 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:09:04,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-25 00:09:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 168. [2023-11-25 00:09:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 121 states have (on average 1.6859504132231404) internal successors, (204), 166 states have internal predecessors, (204), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2023-11-25 00:09:04,592 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 20 [2023-11-25 00:09:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:04,593 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2023-11-25 00:09:04,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:09:04,594 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2023-11-25 00:09:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-25 00:09:04,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:04,595 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, 1] [2023-11-25 00:09:04,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-25 00:09:04,596 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-25 00:09:04,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:04,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1544306206, now seen corresponding path program 1 times [2023-11-25 00:09:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:04,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807090516] [2023-11-25 00:09:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:05,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:05,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807090516] [2023-11-25 00:09:05,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807090516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:09:05,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234191348] [2023-11-25 00:09:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:05,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:05,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:09:05,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:09:05,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27561099-2bab-4730-95eb-059cbf22992a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:09:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:05,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-25 00:09:05,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:09:05,445 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 [2023-11-25 00:09:05,589 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-25 00:09:05,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-25 00:09:05,706 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 [2023-11-25 00:09:05,818 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-25 00:09:05,819 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 [2023-11-25 00:09:05,912 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-25 00:09:05,912 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-25 00:09:05,962 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-25 00:09:05,962 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 [2023-11-25 00:09:06,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-25 00:09:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:06,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:09:10,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-25 00:09:10,973 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 38 treesize of output 31 [2023-11-25 00:09:10,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-25 00:09:10,999 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 252 treesize of output 227 [2023-11-25 00:09:11,021 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 171 treesize of output 163 [2023-11-25 00:09:11,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-25 00:09:11,052 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 163 treesize of output 159 [2023-11-25 00:09:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:09:13,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234191348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:09:13,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788909275] [2023-11-25 00:09:13,704 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-25 00:09:13,704 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:09:13,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:09:13,715 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:09:13,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:09:20,498 INFO L180 IcfgInterpreter]: Interpretation finished