./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 cf1a7837 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_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/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_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2bd23b8476745cc5eeb44766af6c01d42c768ef8188ecd9b3f71230eca21db6b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:59:42,959 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:59:43,050 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:59:43,064 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:59:43,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:59:43,109 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:59:43,110 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:59:43,110 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:59:43,112 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:59:43,117 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:59:43,117 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:59:43,119 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:59:43,119 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:59:43,121 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:59:43,122 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:59:43,122 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:59:43,123 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:59:43,123 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:59:43,123 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:59:43,124 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:59:43,125 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:59:43,125 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:59:43,126 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:59:43,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:59:43,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:59:43,127 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:59:43,128 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:59:43,128 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:59:43,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:59:43,129 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:59:43,130 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:59:43,131 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:59:43,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:59:43,131 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:59:43,131 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:59:43,132 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:59:43,132 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:59:43,132 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:59:43,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:59:43,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:43,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:59:43,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:59:43,134 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:59:43,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:59:43,134 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:59:43,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:59:43,135 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_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bd23b8476745cc5eeb44766af6c01d42c768ef8188ecd9b3f71230eca21db6b [2023-11-12 00:59:43,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:59:43,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:59:43,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:59:43,487 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:59:43,489 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:59:43,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2023-11-12 00:59:46,623 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:59:46,938 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:59:46,939 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2023-11-12 00:59:46,955 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/data/4591a0d78/302c4da7c1094cd8b6a791d8329cbb16/FLAG3bd5919e6 [2023-11-12 00:59:46,970 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/data/4591a0d78/302c4da7c1094cd8b6a791d8329cbb16 [2023-11-12 00:59:46,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:59:46,974 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:59:46,976 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:46,976 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:59:46,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:59:46,983 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:46" (1/1) ... [2023-11-12 00:59:46,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2427f0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:46, skipping insertion in model container [2023-11-12 00:59:46,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:46" (1/1) ... [2023-11-12 00:59:47,031 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:59:47,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:47,409 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:59:47,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:47,487 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:59:47,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47 WrapperNode [2023-11-12 00:59:47,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:47,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:47,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:59:47,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:59:47,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,512 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,544 INFO L138 Inliner]: procedures = 119, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 170 [2023-11-12 00:59:47,545 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:47,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:59:47,546 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:59:47,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:59:47,556 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,561 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,579 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,581 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,583 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,587 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:59:47,588 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:59:47,588 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:59:47,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:59:47,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:47,629 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:59:47,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:59:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-12 00:59:47,689 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-12 00:59:47,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:59:47,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:59:47,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:59:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:59:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:59:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:59:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:59:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:59:47,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:59:47,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:59:47,811 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:59:47,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:48,409 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:48,459 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:48,459 INFO L302 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-12 00:59:48,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:48 BoogieIcfgContainer [2023-11-12 00:59:48,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:48,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:48,465 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:48,468 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:48,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:46" (1/3) ... [2023-11-12 00:59:48,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112c37f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:48, skipping insertion in model container [2023-11-12 00:59:48,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (2/3) ... [2023-11-12 00:59:48,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112c37f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:48, skipping insertion in model container [2023-11-12 00:59:48,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:48" (3/3) ... [2023-11-12 00:59:48,471 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-2.i [2023-11-12 00:59:48,491 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:48,491 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 74 error locations. [2023-11-12 00:59:48,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:48,550 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;@1a5508d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:48,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 74 error locations. [2023-11-12 00:59:48,555 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) [2023-11-12 00:59:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:59:48,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:48,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:59:48,562 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)] === [2023-11-12 00:59:48,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash 11483, now seen corresponding path program 1 times [2023-11-12 00:59:48,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:48,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424733628] [2023-11-12 00:59:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:48,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:48,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:48,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424733628] [2023-11-12 00:59:48,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424733628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:48,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:48,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:59:48,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880876246] [2023-11-12 00:59:48,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:48,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:48,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:48,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:48,846 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) [2023-11-12 00:59:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:49,164 INFO L93 Difference]: Finished difference Result 175 states and 188 transitions. [2023-11-12 00:59:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:49,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-12 00:59:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:49,179 INFO L225 Difference]: With dead ends: 175 [2023-11-12 00:59:49,179 INFO L226 Difference]: Without dead ends: 174 [2023-11-12 00:59:49,181 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 [2023-11-12 00:59:49,188 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:49,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 99 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:59:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-12 00:59:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 150. [2023-11-12 00:59:49,247 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) [2023-11-12 00:59:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2023-11-12 00:59:49,252 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 2 [2023-11-12 00:59:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:49,252 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2023-11-12 00:59:49,253 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) [2023-11-12 00:59:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2023-11-12 00:59:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 00:59:49,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:49,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 00:59:49,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:59:49,254 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)] === [2023-11-12 00:59:49,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash 11484, now seen corresponding path program 1 times [2023-11-12 00:59:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:49,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410092016] [2023-11-12 00:59:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:49,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:49,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410092016] [2023-11-12 00:59:49,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410092016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:49,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:49,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:59:49,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593419619] [2023-11-12 00:59:49,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:49,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:49,354 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) [2023-11-12 00:59:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:49,553 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2023-11-12 00:59:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:49,553 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 [2023-11-12 00:59:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:49,559 INFO L225 Difference]: With dead ends: 146 [2023-11-12 00:59:49,559 INFO L226 Difference]: Without dead ends: 146 [2023-11-12 00:59:49,565 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 [2023-11-12 00:59:49,567 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 [2023-11-12 00:59:49,568 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] [2023-11-12 00:59:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-12 00:59:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-11-12 00:59:49,590 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) [2023-11-12 00:59:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 159 transitions. [2023-11-12 00:59:49,596 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 159 transitions. Word has length 2 [2023-11-12 00:59:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:49,597 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 159 transitions. [2023-11-12 00:59:49,597 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) [2023-11-12 00:59:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 159 transitions. [2023-11-12 00:59:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:59:49,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:49,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:59:49,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:59:49,599 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)] === [2023-11-12 00:59:49,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 342085271, now seen corresponding path program 1 times [2023-11-12 00:59:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:49,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199150986] [2023-11-12 00:59:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:49,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:49,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:49,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199150986] [2023-11-12 00:59:49,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199150986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:49,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:49,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:59:49,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165635154] [2023-11-12 00:59:49,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:49,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:49,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:49,717 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) [2023-11-12 00:59:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:49,872 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2023-11-12 00:59:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:49,877 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 [2023-11-12 00:59:49,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:49,880 INFO L225 Difference]: With dead ends: 142 [2023-11-12 00:59:49,880 INFO L226 Difference]: Without dead ends: 142 [2023-11-12 00:59:49,881 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 [2023-11-12 00:59:49,889 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:49,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 89 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-12 00:59:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-11-12 00:59:49,905 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) [2023-11-12 00:59:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2023-11-12 00:59:49,907 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 5 [2023-11-12 00:59:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:49,908 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2023-11-12 00:59:49,908 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) [2023-11-12 00:59:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2023-11-12 00:59:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:59:49,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:49,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:59:49,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:59:49,909 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)] === [2023-11-12 00:59:49,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:49,910 INFO L85 PathProgramCache]: Analyzing trace with hash 342085272, now seen corresponding path program 1 times [2023-11-12 00:59:49,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:49,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544751817] [2023-11-12 00:59:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:49,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:50,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:50,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544751817] [2023-11-12 00:59:50,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544751817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:50,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:50,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:59:50,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809133248] [2023-11-12 00:59:50,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:50,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:50,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:50,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:50,118 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) [2023-11-12 00:59:50,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:50,281 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2023-11-12 00:59:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:50,282 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 [2023-11-12 00:59:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:50,283 INFO L225 Difference]: With dead ends: 154 [2023-11-12 00:59:50,298 INFO L226 Difference]: Without dead ends: 154 [2023-11-12 00:59:50,298 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 [2023-11-12 00:59:50,300 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 113 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-11-12 00:59:50,300 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] [2023-11-12 00:59:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-12 00:59:50,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 142. [2023-11-12 00:59:50,308 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) [2023-11-12 00:59:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2023-11-12 00:59:50,310 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 5 [2023-11-12 00:59:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:50,311 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2023-11-12 00:59:50,311 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) [2023-11-12 00:59:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2023-11-12 00:59:50,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:59:50,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:50,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:50,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:59:50,317 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)] === [2023-11-12 00:59:50,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:50,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1178587661, now seen corresponding path program 1 times [2023-11-12 00:59:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:50,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26277760] [2023-11-12 00:59:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:50,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:50,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:50,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26277760] [2023-11-12 00:59:50,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26277760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:50,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:50,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:59:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079561311] [2023-11-12 00:59:50,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:50,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:59:50,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:50,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:59:50,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:59:50,574 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) [2023-11-12 00:59:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:50,772 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2023-11-12 00:59:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:50,773 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 [2023-11-12 00:59:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:50,774 INFO L225 Difference]: With dead ends: 140 [2023-11-12 00:59:50,774 INFO L226 Difference]: Without dead ends: 140 [2023-11-12 00:59:50,775 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 [2023-11-12 00:59:50,776 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 178 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-11-12 00:59:50,776 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] [2023-11-12 00:59:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-12 00:59:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 129. [2023-11-12 00:59:50,792 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) [2023-11-12 00:59:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2023-11-12 00:59:50,795 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 10 [2023-11-12 00:59:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:50,796 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2023-11-12 00:59:50,796 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) [2023-11-12 00:59:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2023-11-12 00:59:50,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:59:50,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:50,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:50,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:59:50,798 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)] === [2023-11-12 00:59:50,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:50,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1178587660, now seen corresponding path program 1 times [2023-11-12 00:59:50,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:50,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467522446] [2023-11-12 00:59:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:50,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:51,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:51,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467522446] [2023-11-12 00:59:51,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467522446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:51,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:51,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:59:51,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242565318] [2023-11-12 00:59:51,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:59:51,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:51,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:59:51,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:59:51,077 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) [2023-11-12 00:59:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:51,348 INFO L93 Difference]: Finished difference Result 163 states and 179 transitions. [2023-11-12 00:59:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:59:51,349 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 [2023-11-12 00:59:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:51,350 INFO L225 Difference]: With dead ends: 163 [2023-11-12 00:59:51,350 INFO L226 Difference]: Without dead ends: 163 [2023-11-12 00:59:51,350 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 [2023-11-12 00:59:51,351 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 [2023-11-12 00:59:51,352 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] [2023-11-12 00:59:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-12 00:59:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2023-11-12 00:59:51,356 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) [2023-11-12 00:59:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2023-11-12 00:59:51,357 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 10 [2023-11-12 00:59:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:51,357 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2023-11-12 00:59:51,358 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) [2023-11-12 00:59:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2023-11-12 00:59:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:59:51,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:51,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:51,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:59:51,359 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)] === [2023-11-12 00:59:51,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1248910816, now seen corresponding path program 1 times [2023-11-12 00:59:51,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:51,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425382079] [2023-11-12 00:59:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:51,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:51,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:51,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425382079] [2023-11-12 00:59:51,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425382079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:51,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:51,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:59:51,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823905641] [2023-11-12 00:59:51,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:51,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:51,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:51,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:51,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:51,489 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) [2023-11-12 00:59:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:51,684 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2023-11-12 00:59:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:51,684 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 [2023-11-12 00:59:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:51,685 INFO L225 Difference]: With dead ends: 136 [2023-11-12 00:59:51,685 INFO L226 Difference]: Without dead ends: 136 [2023-11-12 00:59:51,686 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 [2023-11-12 00:59:51,687 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 6 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-11-12 00:59:51,687 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] [2023-11-12 00:59:51,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-12 00:59:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-11-12 00:59:51,691 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) [2023-11-12 00:59:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2023-11-12 00:59:51,692 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 12 [2023-11-12 00:59:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:51,692 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2023-11-12 00:59:51,693 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) [2023-11-12 00:59:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2023-11-12 00:59:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:59:51,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:51,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:51,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:59:51,694 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)] === [2023-11-12 00:59:51,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:51,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1248910817, now seen corresponding path program 1 times [2023-11-12 00:59:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:51,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871442291] [2023-11-12 00:59:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:51,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:51,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:51,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871442291] [2023-11-12 00:59:51,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871442291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:51,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:51,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:59:51,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194611274] [2023-11-12 00:59:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:51,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:51,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:51,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:51,929 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) [2023-11-12 00:59:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:52,155 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2023-11-12 00:59:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:52,156 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 [2023-11-12 00:59:52,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:52,157 INFO L225 Difference]: With dead ends: 135 [2023-11-12 00:59:52,157 INFO L226 Difference]: Without dead ends: 135 [2023-11-12 00:59:52,157 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 [2023-11-12 00:59:52,158 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 [2023-11-12 00:59:52,159 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] [2023-11-12 00:59:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-12 00:59:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-12 00:59:52,163 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) [2023-11-12 00:59:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 152 transitions. [2023-11-12 00:59:52,164 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 152 transitions. Word has length 12 [2023-11-12 00:59:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:52,164 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 152 transitions. [2023-11-12 00:59:52,165 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) [2023-11-12 00:59:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 152 transitions. [2023-11-12 00:59:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:59:52,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:52,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:52,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:59:52,166 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)] === [2023-11-12 00:59:52,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1683000235, now seen corresponding path program 1 times [2023-11-12 00:59:52,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:52,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160181209] [2023-11-12 00:59:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:52,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:52,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160181209] [2023-11-12 00:59:52,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160181209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:52,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:52,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:52,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772473721] [2023-11-12 00:59:52,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:52,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:52,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:52,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:52,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:52,255 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) [2023-11-12 00:59:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:52,487 INFO L93 Difference]: Finished difference Result 169 states and 184 transitions. [2023-11-12 00:59:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:52,489 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 [2023-11-12 00:59:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:52,491 INFO L225 Difference]: With dead ends: 169 [2023-11-12 00:59:52,491 INFO L226 Difference]: Without dead ends: 169 [2023-11-12 00:59:52,492 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 [2023-11-12 00:59:52,494 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 [2023-11-12 00:59:52,495 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] [2023-11-12 00:59:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-12 00:59:52,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 137. [2023-11-12 00:59:52,500 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) [2023-11-12 00:59:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2023-11-12 00:59:52,501 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 14 [2023-11-12 00:59:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:52,502 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2023-11-12 00:59:52,502 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) [2023-11-12 00:59:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2023-11-12 00:59:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:59:52,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:52,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:52,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:59:52,504 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)] === [2023-11-12 00:59:52,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:52,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1907703943, now seen corresponding path program 1 times [2023-11-12 00:59:52,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:52,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269411382] [2023-11-12 00:59:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:52,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:52,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269411382] [2023-11-12 00:59:52,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269411382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:52,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:52,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:59:52,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856072744] [2023-11-12 00:59:52,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:52,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:59:52,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:52,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:59:52,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:52,868 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) [2023-11-12 00:59:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:53,342 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2023-11-12 00:59:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:59:53,343 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 [2023-11-12 00:59:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:53,344 INFO L225 Difference]: With dead ends: 136 [2023-11-12 00:59:53,344 INFO L226 Difference]: Without dead ends: 136 [2023-11-12 00:59:53,344 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 [2023-11-12 00:59:53,345 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:53,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 214 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:59:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-12 00:59:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-11-12 00:59:53,350 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) [2023-11-12 00:59:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2023-11-12 00:59:53,351 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 14 [2023-11-12 00:59:53,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:53,351 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2023-11-12 00:59:53,352 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) [2023-11-12 00:59:53,352 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2023-11-12 00:59:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:59:53,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:53,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:53,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:59:53,353 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)] === [2023-11-12 00:59:53,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1907703944, now seen corresponding path program 1 times [2023-11-12 00:59:53,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:53,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482039345] [2023-11-12 00:59:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:53,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:53,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:53,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482039345] [2023-11-12 00:59:53,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482039345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:53,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:53,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:59:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431740688] [2023-11-12 00:59:53,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:53,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:59:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:59:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:53,833 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) [2023-11-12 00:59:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:54,488 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2023-11-12 00:59:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:59:54,490 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 [2023-11-12 00:59:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:54,491 INFO L225 Difference]: With dead ends: 148 [2023-11-12 00:59:54,491 INFO L226 Difference]: Without dead ends: 148 [2023-11-12 00:59:54,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:59:54,492 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 183 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2023-11-12 00:59:54,493 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] [2023-11-12 00:59:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-12 00:59:54,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2023-11-12 00:59:54,498 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) [2023-11-12 00:59:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2023-11-12 00:59:54,499 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 14 [2023-11-12 00:59:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:54,500 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2023-11-12 00:59:54,500 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) [2023-11-12 00:59:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2023-11-12 00:59:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:59:54,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:54,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:54,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:59:54,502 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)] === [2023-11-12 00:59:54,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1968570437, now seen corresponding path program 1 times [2023-11-12 00:59:54,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:54,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090378199] [2023-11-12 00:59:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:54,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:54,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:54,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090378199] [2023-11-12 00:59:54,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090378199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:54,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:54,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:59:54,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804355744] [2023-11-12 00:59:54,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:59:54,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:59:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:54,744 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) [2023-11-12 00:59:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:55,099 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2023-11-12 00:59:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:59:55,100 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 [2023-11-12 00:59:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:55,101 INFO L225 Difference]: With dead ends: 188 [2023-11-12 00:59:55,101 INFO L226 Difference]: Without dead ends: 188 [2023-11-12 00:59:55,102 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 [2023-11-12 00:59:55,102 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 [2023-11-12 00:59:55,103 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] [2023-11-12 00:59:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-12 00:59:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2023-11-12 00:59:55,107 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) [2023-11-12 00:59:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2023-11-12 00:59:55,108 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 17 [2023-11-12 00:59:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:55,109 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2023-11-12 00:59:55,109 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) [2023-11-12 00:59:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2023-11-12 00:59:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 00:59:55,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:55,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:55,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 00:59:55,111 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)] === [2023-11-12 00:59:55,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:55,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1588075935, now seen corresponding path program 1 times [2023-11-12 00:59:55,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:55,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925041959] [2023-11-12 00:59:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:55,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:55,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:55,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925041959] [2023-11-12 00:59:55,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925041959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:55,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:55,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:59:55,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615050723] [2023-11-12 00:59:55,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:55,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:55,286 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) [2023-11-12 00:59:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:55,448 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2023-11-12 00:59:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:55,449 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 [2023-11-12 00:59:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:55,450 INFO L225 Difference]: With dead ends: 144 [2023-11-12 00:59:55,451 INFO L226 Difference]: Without dead ends: 144 [2023-11-12 00:59:55,451 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 [2023-11-12 00:59:55,452 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:55,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 279 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-12 00:59:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-11-12 00:59:55,467 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) [2023-11-12 00:59:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 164 transitions. [2023-11-12 00:59:55,468 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 164 transitions. Word has length 19 [2023-11-12 00:59:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:55,470 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 164 transitions. [2023-11-12 00:59:55,470 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) [2023-11-12 00:59:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 164 transitions. [2023-11-12 00:59:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 00:59:55,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:55,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:55,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:59:55,473 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)] === [2023-11-12 00:59:55,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:55,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1588075936, now seen corresponding path program 1 times [2023-11-12 00:59:55,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:55,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406565920] [2023-11-12 00:59:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:55,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:55,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:55,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406565920] [2023-11-12 00:59:55,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406565920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:55,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:55,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:59:55,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697177597] [2023-11-12 00:59:55,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:55,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:55,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:55,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:55,762 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) [2023-11-12 00:59:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:55,953 INFO L93 Difference]: Finished difference Result 143 states and 163 transitions. [2023-11-12 00:59:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:55,953 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 [2023-11-12 00:59:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:55,954 INFO L225 Difference]: With dead ends: 143 [2023-11-12 00:59:55,955 INFO L226 Difference]: Without dead ends: 143 [2023-11-12 00:59:55,955 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 [2023-11-12 00:59:55,955 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 [2023-11-12 00:59:55,956 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] [2023-11-12 00:59:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-12 00:59:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-11-12 00:59:55,960 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) [2023-11-12 00:59:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 163 transitions. [2023-11-12 00:59:55,961 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 163 transitions. Word has length 19 [2023-11-12 00:59:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:55,961 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 163 transitions. [2023-11-12 00:59:55,961 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) [2023-11-12 00:59:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 163 transitions. [2023-11-12 00:59:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:59:55,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:55,962 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] [2023-11-12 00:59:55,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 00:59:55,963 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)] === [2023-11-12 00:59:55,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1488523799, now seen corresponding path program 1 times [2023-11-12 00:59:55,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:55,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521571853] [2023-11-12 00:59:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:55,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:56,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:56,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521571853] [2023-11-12 00:59:56,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521571853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:56,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:56,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:59:56,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028680478] [2023-11-12 00:59:56,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:56,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:59:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:56,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:59:56,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:59:56,066 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) [2023-11-12 00:59:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:56,190 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2023-11-12 00:59:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:59:56,190 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 [2023-11-12 00:59:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:56,191 INFO L225 Difference]: With dead ends: 142 [2023-11-12 00:59:56,191 INFO L226 Difference]: Without dead ends: 142 [2023-11-12 00:59:56,192 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 [2023-11-12 00:59:56,192 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 [2023-11-12 00:59:56,192 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] [2023-11-12 00:59:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-12 00:59:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-12 00:59:56,196 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) [2023-11-12 00:59:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 160 transitions. [2023-11-12 00:59:56,197 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 160 transitions. Word has length 21 [2023-11-12 00:59:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:56,197 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 160 transitions. [2023-11-12 00:59:56,198 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) [2023-11-12 00:59:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 160 transitions. [2023-11-12 00:59:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:59:56,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:56,199 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] [2023-11-12 00:59:56,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 00:59:56,199 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)] === [2023-11-12 00:59:56,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1675246444, now seen corresponding path program 1 times [2023-11-12 00:59:56,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:56,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150431862] [2023-11-12 00:59:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:56,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:56,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:56,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150431862] [2023-11-12 00:59:56,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150431862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:56,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78956678] [2023-11-12 00:59:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:56,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:56,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:56,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:56,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b18daad8-a552-4472-a83d-f47e00037c1b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:56,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 00:59:56,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:56,778 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 [2023-11-12 00:59:56,786 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 [2023-11-12 00:59:56,833 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 [2023-11-12 00:59:56,842 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 [2023-11-12 00:59:56,878 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 [2023-11-12 00:59:56,887 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 [2023-11-12 00:59:57,063 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 [2023-11-12 00:59:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:57,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:57,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78956678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:57,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161619477] [2023-11-12 00:59:57,222 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-12 00:59:57,223 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:57,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:57,233 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:57,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:58,241 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:11,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [161619477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:11,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:11,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 6, 5] total 21 [2023-11-12 01:00:11,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135887986] [2023-11-12 01:00:11,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:11,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 01:00:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 01:00:11,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=303, Unknown=19, NotChecked=0, Total=420 [2023-11-12 01:00:11,515 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) [2023-11-12 01:00:18,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:00:21,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:00:28,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:00:31,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:00:32,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:00:41,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:00:45,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]