./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2bd23b8476745cc5eeb44766af6c01d42c768ef8188ecd9b3f71230eca21db6b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:07:46,272 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:07:46,364 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 21:07:46,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:07:46,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:07:46,392 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:07:46,393 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:07:46,393 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:07:46,394 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:07:46,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:07:46,396 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:07:46,396 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:07:46,397 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:07:46,397 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:07:46,398 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:07:46,399 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:07:46,399 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:07:46,400 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:07:46,400 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:07:46,401 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:07:46,401 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:07:46,402 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:07:46,403 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:07:46,403 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:07:46,404 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:07:46,404 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:07:46,405 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:07:46,405 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:07:46,406 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:07:46,406 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:07:46,407 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:07:46,407 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:07:46,408 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:07:46,408 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:07:46,409 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:07:46,409 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:07:46,410 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:07:46,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:07:46,411 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:07:46,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:07:46,412 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:07:46,412 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:07:46,413 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:07:46,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:07:46,414 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:07:46,414 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:07:46,414 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_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bd23b8476745cc5eeb44766af6c01d42c768ef8188ecd9b3f71230eca21db6b [2023-11-06 21:07:46,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:07:46,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:07:46,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:07:46,721 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:07:46,725 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:07:46,726 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2023-11-06 21:07:49,905 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:07:50,222 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:07:50,223 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2023-11-06 21:07:50,243 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/data/16e06941c/0c7b577018544d11937136e2cc97e413/FLAG9fe4028de [2023-11-06 21:07:50,264 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/data/16e06941c/0c7b577018544d11937136e2cc97e413 [2023-11-06 21:07:50,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:07:50,276 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:07:50,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:07:50,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:07:50,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:07:50,286 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3542c69d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50, skipping insertion in model container [2023-11-06 21:07:50,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,362 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:07:50,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:07:50,717 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:07:50,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:07:50,802 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:07:50,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50 WrapperNode [2023-11-06 21:07:50,804 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:07:50,805 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:07:50,805 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:07:50,806 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:07:50,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,839 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,875 INFO L138 Inliner]: procedures = 119, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 170 [2023-11-06 21:07:50,876 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:07:50,876 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:07:50,877 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:07:50,877 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:07:50,888 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,912 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,915 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,930 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:07:50,931 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:07:50,932 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:07:50,932 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:07:50,933 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (1/1) ... [2023-11-06 21:07:50,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:07:50,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:07:51,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:07:51,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:07:51,034 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-06 21:07:51,035 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-06 21:07:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:07:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:07:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:07:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:07:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 21:07:51,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 21:07:51,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:07:51,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:07:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:07:51,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:07:51,189 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:07:51,191 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:07:51,732 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:07:51,813 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:07:51,814 INFO L302 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-06 21:07:51,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:07:51 BoogieIcfgContainer [2023-11-06 21:07:51,817 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:07:51,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:07:51,820 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:07:51,823 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:07:51,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:07:50" (1/3) ... [2023-11-06 21:07:51,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80f7cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:07:51, skipping insertion in model container [2023-11-06 21:07:51,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:50" (2/3) ... [2023-11-06 21:07:51,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80f7cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:07:51, skipping insertion in model container [2023-11-06 21:07:51,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:07:51" (3/3) ... [2023-11-06 21:07:51,829 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-2.i [2023-11-06 21:07:51,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:07:51,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 74 error locations. [2023-11-06 21:07:51,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:07:51,937 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;@630b6e85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:07:51,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 74 error locations. [2023-11-06 21:07:51,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 76 states have (on average 2.3552631578947367) internal successors, (179), 150 states have internal predecessors, (179), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 21:07:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:07:51,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:51,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:07:51,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:51,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:51,957 INFO L85 PathProgramCache]: Analyzing trace with hash 11483, now seen corresponding path program 1 times [2023-11-06 21:07:51,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:51,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935592475] [2023-11-06 21:07:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:51,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:52,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:52,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935592475] [2023-11-06 21:07:52,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935592475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:52,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:52,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:07:52,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171675975] [2023-11-06 21:07:52,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:52,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:07:52,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:52,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:07:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:07:52,296 INFO L87 Difference]: Start difference. First operand has 159 states, 76 states have (on average 2.3552631578947367) internal successors, (179), 150 states have internal predecessors, (179), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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) [2023-11-06 21:07:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:52,610 INFO L93 Difference]: Finished difference Result 175 states and 188 transitions. [2023-11-06 21:07:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:07:52,613 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 [2023-11-06 21:07:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:52,626 INFO L225 Difference]: With dead ends: 175 [2023-11-06 21:07:52,627 INFO L226 Difference]: Without dead ends: 174 [2023-11-06 21:07:52,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:07:52,634 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:52,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 99 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-06 21:07:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 150. [2023-11-06 21:07:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 148 states have internal predecessors, (157), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2023-11-06 21:07:52,697 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 2 [2023-11-06 21:07:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:52,697 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2023-11-06 21:07:52,697 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) [2023-11-06 21:07:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2023-11-06 21:07:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:07:52,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:52,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:07:52,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:07:52,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:52,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash 11484, now seen corresponding path program 1 times [2023-11-06 21:07:52,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:52,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106110871] [2023-11-06 21:07:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:52,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:52,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106110871] [2023-11-06 21:07:52,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106110871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:52,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:52,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:07:52,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498995052] [2023-11-06 21:07:52,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:52,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:07:52,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:52,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:07:52,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:07:52,806 INFO L87 Difference]: Start difference. First operand 150 states and 164 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) [2023-11-06 21:07:52,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:52,974 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2023-11-06 21:07:52,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:07:52,975 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 [2023-11-06 21:07:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:52,977 INFO L225 Difference]: With dead ends: 146 [2023-11-06 21:07:52,977 INFO L226 Difference]: Without dead ends: 146 [2023-11-06 21:07:52,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:07:52,979 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 140 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:52,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 79 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-06 21:07:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-11-06 21:07:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 72 states have (on average 2.111111111111111) internal successors, (152), 144 states have internal predecessors, (152), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 159 transitions. [2023-11-06 21:07:52,992 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 159 transitions. Word has length 2 [2023-11-06 21:07:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:52,993 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 159 transitions. [2023-11-06 21:07:52,993 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) [2023-11-06 21:07:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 159 transitions. [2023-11-06 21:07:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:07:52,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:52,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:07:52,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:07:52,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:52,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash 342085271, now seen corresponding path program 1 times [2023-11-06 21:07:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:52,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630604977] [2023-11-06 21:07:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:52,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:53,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:53,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630604977] [2023-11-06 21:07:53,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630604977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:53,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:53,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:07:53,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591529907] [2023-11-06 21:07:53,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:53,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:07:53,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:07:53,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:07:53,140 INFO L87 Difference]: Start difference. First operand 146 states and 159 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:53,317 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2023-11-06 21:07:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:07:53,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:07:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:53,319 INFO L225 Difference]: With dead ends: 142 [2023-11-06 21:07:53,319 INFO L226 Difference]: Without dead ends: 142 [2023-11-06 21:07:53,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:07:53,321 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 116 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:53,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 89 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-06 21:07:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-11-06 21:07:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 138 states have internal predecessors, (147), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2023-11-06 21:07:53,333 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 5 [2023-11-06 21:07:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:53,333 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2023-11-06 21:07:53,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2023-11-06 21:07:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:07:53,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:53,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:07:53,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:07:53,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:53,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash 342085272, now seen corresponding path program 1 times [2023-11-06 21:07:53,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:53,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588549753] [2023-11-06 21:07:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:53,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:53,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:53,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588549753] [2023-11-06 21:07:53,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588549753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:53,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:53,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:07:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322630869] [2023-11-06 21:07:53,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:53,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:07:53,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:53,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:07:53,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:07:53,518 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:53,724 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2023-11-06 21:07:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:07:53,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:07:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:53,727 INFO L225 Difference]: With dead ends: 154 [2023-11-06 21:07:53,727 INFO L226 Difference]: Without dead ends: 154 [2023-11-06 21:07:53,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:07:53,739 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 113 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:53,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 97 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-06 21:07:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 142. [2023-11-06 21:07:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 140 states have internal predecessors, (149), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2023-11-06 21:07:53,762 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 5 [2023-11-06 21:07:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:53,762 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2023-11-06 21:07:53,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2023-11-06 21:07:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:07:53,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:53,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:53,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:07:53,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:53,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1178587661, now seen corresponding path program 1 times [2023-11-06 21:07:53,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:53,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039349354] [2023-11-06 21:07:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:53,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:53,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039349354] [2023-11-06 21:07:53,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039349354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:53,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:53,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:07:53,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289472209] [2023-11-06 21:07:53,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:53,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:07:53,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:53,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:07:53,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:07:53,998 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:54,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:54,240 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2023-11-06 21:07:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:07:54,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 21:07:54,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:54,242 INFO L225 Difference]: With dead ends: 140 [2023-11-06 21:07:54,242 INFO L226 Difference]: Without dead ends: 140 [2023-11-06 21:07:54,242 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 [2023-11-06 21:07:54,243 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 178 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:54,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 77 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-06 21:07:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 129. [2023-11-06 21:07:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 80 states have (on average 1.725) internal successors, (138), 127 states have internal predecessors, (138), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2023-11-06 21:07:54,253 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 10 [2023-11-06 21:07:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:54,253 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2023-11-06 21:07:54,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2023-11-06 21:07:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:07:54,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:54,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:54,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:07:54,261 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:54,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:54,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1178587660, now seen corresponding path program 1 times [2023-11-06 21:07:54,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:54,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087771443] [2023-11-06 21:07:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:54,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:54,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:54,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087771443] [2023-11-06 21:07:54,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087771443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:54,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:54,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:07:54,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963435665] [2023-11-06 21:07:54,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:54,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:07:54,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:07:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:07:54,503 INFO L87 Difference]: Start difference. First operand 129 states and 145 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:54,763 INFO L93 Difference]: Finished difference Result 163 states and 179 transitions. [2023-11-06 21:07:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:07:54,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 21:07:54,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:54,765 INFO L225 Difference]: With dead ends: 163 [2023-11-06 21:07:54,766 INFO L226 Difference]: Without dead ends: 163 [2023-11-06 21:07:54,766 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 [2023-11-06 21:07:54,767 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 152 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:54,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 110 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-06 21:07:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2023-11-06 21:07:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 1.6741573033707866) internal successors, (149), 135 states have internal predecessors, (149), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2023-11-06 21:07:54,775 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 10 [2023-11-06 21:07:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:54,776 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2023-11-06 21:07:54,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2023-11-06 21:07:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:07:54,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:54,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:54,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:07:54,777 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:54,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:54,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1248910816, now seen corresponding path program 1 times [2023-11-06 21:07:54,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:54,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463753424] [2023-11-06 21:07:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:54,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:54,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:54,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463753424] [2023-11-06 21:07:54,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463753424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:54,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:54,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:07:54,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407325661] [2023-11-06 21:07:54,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:54,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:07:54,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:54,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:07:54,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:07:54,918 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:55,130 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2023-11-06 21:07:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:07:55,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 21:07:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:55,132 INFO L225 Difference]: With dead ends: 136 [2023-11-06 21:07:55,133 INFO L226 Difference]: Without dead ends: 136 [2023-11-06 21:07:55,133 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 [2023-11-06 21:07:55,134 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 6 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:55,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 303 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-06 21:07:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-11-06 21:07:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 89 states have (on average 1.651685393258427) internal successors, (147), 134 states have internal predecessors, (147), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2023-11-06 21:07:55,141 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 12 [2023-11-06 21:07:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:55,142 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2023-11-06 21:07:55,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2023-11-06 21:07:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:07:55,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:55,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:55,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:07:55,143 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:55,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1248910817, now seen corresponding path program 1 times [2023-11-06 21:07:55,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:55,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947094575] [2023-11-06 21:07:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:55,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:55,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:55,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947094575] [2023-11-06 21:07:55,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947094575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:55,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:55,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:07:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640968666] [2023-11-06 21:07:55,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:55,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:07:55,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:07:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:07:55,400 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:55,621 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2023-11-06 21:07:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:07:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 21:07:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:55,622 INFO L225 Difference]: With dead ends: 135 [2023-11-06 21:07:55,623 INFO L226 Difference]: Without dead ends: 135 [2023-11-06 21:07:55,623 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 [2023-11-06 21:07:55,624 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 3 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:55,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 292 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-06 21:07:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-06 21:07:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 89 states have (on average 1.6292134831460674) internal successors, (145), 133 states have internal predecessors, (145), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 152 transitions. [2023-11-06 21:07:55,629 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 152 transitions. Word has length 12 [2023-11-06 21:07:55,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:55,630 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 152 transitions. [2023-11-06 21:07:55,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 152 transitions. [2023-11-06 21:07:55,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 21:07:55,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:55,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:55,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:07:55,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:55,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1683000235, now seen corresponding path program 1 times [2023-11-06 21:07:55,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:55,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411333171] [2023-11-06 21:07:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:55,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:55,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411333171] [2023-11-06 21:07:55,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411333171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:55,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:55,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:07:55,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567444711] [2023-11-06 21:07:55,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:55,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:07:55,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:55,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:07:55,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:07:55,715 INFO L87 Difference]: Start difference. First operand 135 states and 152 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-06 21:07:55,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:55,963 INFO L93 Difference]: Finished difference Result 169 states and 184 transitions. [2023-11-06 21:07:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:07:55,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 14 [2023-11-06 21:07:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:55,965 INFO L225 Difference]: With dead ends: 169 [2023-11-06 21:07:55,966 INFO L226 Difference]: Without dead ends: 169 [2023-11-06 21:07:55,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:07:55,967 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 242 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:55,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 142 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:55,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-06 21:07:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 137. [2023-11-06 21:07:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 92 states have (on average 1.5978260869565217) internal successors, (147), 135 states have internal predecessors, (147), 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) [2023-11-06 21:07:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2023-11-06 21:07:55,973 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 14 [2023-11-06 21:07:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:55,974 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2023-11-06 21:07:55,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-06 21:07:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2023-11-06 21:07:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 21:07:55,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:55,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:55,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:07:55,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:55,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:55,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1907703943, now seen corresponding path program 1 times [2023-11-06 21:07:55,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:55,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365481077] [2023-11-06 21:07:55,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:55,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:56,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365481077] [2023-11-06 21:07:56,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365481077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:56,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:56,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 21:07:56,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132434251] [2023-11-06 21:07:56,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:56,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:07:56,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:56,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:07:56,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:07:56,284 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:56,677 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2023-11-06 21:07:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:07:56,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 21:07:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:56,678 INFO L225 Difference]: With dead ends: 136 [2023-11-06 21:07:56,679 INFO L226 Difference]: Without dead ends: 136 [2023-11-06 21:07:56,679 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 [2023-11-06 21:07:56,680 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 149 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:56,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 214 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:07:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-06 21:07:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-11-06 21:07:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 92 states have (on average 1.5869565217391304) internal successors, (146), 134 states have internal predecessors, (146), 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) [2023-11-06 21:07:56,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2023-11-06 21:07:56,684 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 14 [2023-11-06 21:07:56,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:56,685 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2023-11-06 21:07:56,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:56,685 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2023-11-06 21:07:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 21:07:56,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:56,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:56,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:07:56,686 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:56,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:56,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1907703944, now seen corresponding path program 1 times [2023-11-06 21:07:56,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:56,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092922245] [2023-11-06 21:07:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:56,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:57,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:57,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092922245] [2023-11-06 21:07:57,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092922245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:57,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:57,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:07:57,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501797121] [2023-11-06 21:07:57,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:57,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:07:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:07:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:07:57,133 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:57,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:57,713 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2023-11-06 21:07:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:07:57,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 21:07:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:57,715 INFO L225 Difference]: With dead ends: 148 [2023-11-06 21:07:57,716 INFO L226 Difference]: Without dead ends: 148 [2023-11-06 21:07:57,716 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 [2023-11-06 21:07:57,717 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 183 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:57,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 280 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:07:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-06 21:07:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2023-11-06 21:07:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 100 states have (on average 1.51) internal successors, (151), 136 states have internal predecessors, (151), 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) [2023-11-06 21:07:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2023-11-06 21:07:57,722 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 14 [2023-11-06 21:07:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:57,722 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2023-11-06 21:07:57,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2023-11-06 21:07:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 21:07:57,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:57,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:57,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 21:07:57,724 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:57,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:57,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1968570437, now seen corresponding path program 1 times [2023-11-06 21:07:57,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:57,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250888896] [2023-11-06 21:07:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:57,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:57,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:57,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250888896] [2023-11-06 21:07:57,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250888896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:57,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:57,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 21:07:57,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793308349] [2023-11-06 21:07:57,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:57,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:07:57,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:07:57,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:07:57,993 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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) [2023-11-06 21:07:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:58,339 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2023-11-06 21:07:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:07:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 17 [2023-11-06 21:07:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:58,341 INFO L225 Difference]: With dead ends: 188 [2023-11-06 21:07:58,341 INFO L226 Difference]: Without dead ends: 188 [2023-11-06 21:07:58,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:07:58,342 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 356 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:58,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 249 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:07:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-06 21:07:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2023-11-06 21:07:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 107 states have (on average 1.485981308411215) internal successors, (159), 143 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) [2023-11-06 21:07:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2023-11-06 21:07:58,348 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 17 [2023-11-06 21:07:58,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:58,349 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2023-11-06 21:07:58,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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) [2023-11-06 21:07:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2023-11-06 21:07:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 21:07:58,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:58,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:58,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 21:07:58,351 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:58,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1588075935, now seen corresponding path program 1 times [2023-11-06 21:07:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562667532] [2023-11-06 21:07:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:58,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:58,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:58,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562667532] [2023-11-06 21:07:58,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562667532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:58,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:07:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658515741] [2023-11-06 21:07:58,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:58,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:07:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:07:58,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:07:58,513 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:58,695 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2023-11-06 21:07:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:07:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 21:07:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:58,697 INFO L225 Difference]: With dead ends: 144 [2023-11-06 21:07:58,697 INFO L226 Difference]: Without dead ends: 144 [2023-11-06 21:07:58,698 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 [2023-11-06 21:07:58,698 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:58,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 279 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-06 21:07:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-11-06 21:07:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.4766355140186915) internal successors, (158), 142 states have internal predecessors, (158), 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) [2023-11-06 21:07:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 164 transitions. [2023-11-06 21:07:58,704 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 164 transitions. Word has length 19 [2023-11-06 21:07:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:58,705 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 164 transitions. [2023-11-06 21:07:58,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 164 transitions. [2023-11-06 21:07:58,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 21:07:58,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:58,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:58,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 21:07:58,707 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:58,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:58,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1588075936, now seen corresponding path program 1 times [2023-11-06 21:07:58,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:58,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121703531] [2023-11-06 21:07:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:58,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:58,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:58,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121703531] [2023-11-06 21:07:58,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121703531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:58,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:58,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:07:58,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791327549] [2023-11-06 21:07:58,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:58,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:07:58,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:58,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:07:58,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:07:58,971 INFO L87 Difference]: Start difference. First operand 144 states and 164 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:59,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:59,168 INFO L93 Difference]: Finished difference Result 143 states and 163 transitions. [2023-11-06 21:07:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:07:59,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 21:07:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:59,170 INFO L225 Difference]: With dead ends: 143 [2023-11-06 21:07:59,170 INFO L226 Difference]: Without dead ends: 143 [2023-11-06 21:07:59,170 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 [2023-11-06 21:07:59,171 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:59,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 273 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:07:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-06 21:07:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-11-06 21:07:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 107 states have (on average 1.4672897196261683) internal successors, (157), 141 states have internal predecessors, (157), 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) [2023-11-06 21:07:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 163 transitions. [2023-11-06 21:07:59,176 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 163 transitions. Word has length 19 [2023-11-06 21:07:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:59,177 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 163 transitions. [2023-11-06 21:07:59,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:07:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 163 transitions. [2023-11-06 21:07:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 21:07:59,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:59,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:59,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 21:07:59,179 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:59,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:59,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1488523799, now seen corresponding path program 1 times [2023-11-06 21:07:59,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:59,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585011541] [2023-11-06 21:07:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:59,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:59,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585011541] [2023-11-06 21:07:59,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585011541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:59,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:59,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:07:59,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401889835] [2023-11-06 21:07:59,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:59,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:07:59,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:07:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:07:59,321 INFO L87 Difference]: Start difference. First operand 143 states and 163 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-11-06 21:07:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:59,447 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2023-11-06 21:07:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:07:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 21 [2023-11-06 21:07:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:59,449 INFO L225 Difference]: With dead ends: 142 [2023-11-06 21:07:59,449 INFO L226 Difference]: Without dead ends: 142 [2023-11-06 21:07:59,451 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 [2023-11-06 21:07:59,452 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:59,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 207 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:07:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-06 21:07:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-06 21:07:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 107 states have (on average 1.4485981308411215) internal successors, (155), 140 states have internal predecessors, (155), 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) [2023-11-06 21:07:59,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 160 transitions. [2023-11-06 21:07:59,460 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 160 transitions. Word has length 21 [2023-11-06 21:07:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:59,460 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 160 transitions. [2023-11-06 21:07:59,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-11-06 21:07:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 160 transitions. [2023-11-06 21:07:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 21:07:59,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:59,464 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:59,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 21:07:59,464 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-11-06 21:07:59,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:59,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1675246444, now seen corresponding path program 1 times [2023-11-06 21:07:59,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:59,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570589691] [2023-11-06 21:07:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:59,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:59,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:59,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570589691] [2023-11-06 21:07:59,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570589691] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:07:59,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368128321] [2023-11-06 21:07:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:59,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:07:59,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:07:59,809 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:07:59,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c35ffbd2-a16b-4d1f-96fb-850741f774e0/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:07:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:59,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 21:07:59,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:00,101 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:08:00,109 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:08:00,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 21:08:00,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 21:08:00,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 21:08:00,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 21:08:00,393 INFO L351 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 15 treesize of output 7 [2023-11-06 21:08:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:00,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:00,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368128321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:00,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873364964] [2023-11-06 21:08:00,534 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-06 21:08:00,534 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:08:00,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:08:00,544 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:08:00,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:08:01,592 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:08:15,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [873364964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:15,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:15,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 6, 5] total 21 [2023-11-06 21:08:15,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893391570] [2023-11-06 21:08:15,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:15,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:08:15,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:08:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=303, Unknown=19, NotChecked=0, Total=420 [2023-11-06 21:08:15,609 INFO L87 Difference]: Start difference. First operand 142 states and 160 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)