./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire --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 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:12:24,241 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:12:24,359 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 21:12:24,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:12:24,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:12:24,409 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:12:24,410 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:12:24,410 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:12:24,412 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:12:24,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:12:24,417 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:12:24,419 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:12:24,419 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:12:24,421 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:12:24,422 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:12:24,422 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:12:24,423 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:12:24,423 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:12:24,424 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:12:24,424 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:12:24,425 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:12:24,425 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:12:24,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:12:24,427 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:12:24,428 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:12:24,428 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:12:24,429 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:12:24,429 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:12:24,430 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:12:24,430 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:12:24,431 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:12:24,432 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:12:24,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:12:24,432 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:12:24,433 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:12:24,433 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:12:24,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:12:24,434 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:12:24,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:12:24,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:12:24,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:24,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:12:24,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:12:24,436 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:12:24,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:12:24,437 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:12:24,437 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:12:24,437 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:12:24,437 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_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 [2023-11-23 21:12:24,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:12:24,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:12:24,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:12:24,837 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:12:24,838 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:12:24,839 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2023-11-23 21:12:28,064 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:12:28,347 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:12:28,348 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2023-11-23 21:12:28,361 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/data/05adee680/f70b166510fb439fb836e37856c8b232/FLAGe5a3b7682 [2023-11-23 21:12:28,376 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/data/05adee680/f70b166510fb439fb836e37856c8b232 [2023-11-23 21:12:28,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:12:28,381 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:12:28,382 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:28,383 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:12:28,388 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:12:28,389 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:28,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb34c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28, skipping insertion in model container [2023-11-23 21:12:28,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:28,446 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:12:28,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:28,841 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:12:28,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:28,962 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:12:28,962 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28 WrapperNode [2023-11-23 21:12:28,963 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:28,964 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:28,964 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:12:28,964 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:12:28,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,008 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,050 INFO L138 Inliner]: procedures = 119, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 166 [2023-11-23 21:12:29,051 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:29,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:12:29,052 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:12:29,052 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:12:29,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,069 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,070 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,086 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,090 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,094 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:12:29,095 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:12:29,096 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:12:29,096 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:12:29,097 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (1/1) ... [2023-11-23 21:12:29,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:29,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:29,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:12:29,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:12:29,180 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-23 21:12:29,181 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-23 21:12:29,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:12:29,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:12:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:12:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:12:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:12:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:12:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:12:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:12:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:12:29,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:12:29,306 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:12:29,309 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:12:29,788 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:12:29,847 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:12:29,848 INFO L309 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-23 21:12:29,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:29 BoogieIcfgContainer [2023-11-23 21:12:29,850 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:12:29,852 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:12:29,852 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:12:29,855 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:12:29,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:12:28" (1/3) ... [2023-11-23 21:12:29,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61954a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:29, skipping insertion in model container [2023-11-23 21:12:29,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:28" (2/3) ... [2023-11-23 21:12:29,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61954a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:29, skipping insertion in model container [2023-11-23 21:12:29,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:29" (3/3) ... [2023-11-23 21:12:29,858 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2023-11-23 21:12:29,878 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:12:29,878 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 71 error locations. [2023-11-23 21:12:29,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:12:29,935 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;@23420e96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:12:29,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-11-23 21:12:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 73 states have (on average 2.3698630136986303) internal successors, (173), 144 states have internal predecessors, (173), 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) [2023-11-23 21:12:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-23 21:12:29,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:29,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-23 21:12:29,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:29,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:29,954 INFO L85 PathProgramCache]: Analyzing trace with hash 11638, now seen corresponding path program 1 times [2023-11-23 21:12:29,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:29,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309474446] [2023-11-23 21:12:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:29,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:30,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:30,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309474446] [2023-11-23 21:12:30,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309474446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:30,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:30,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:12:30,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389209234] [2023-11-23 21:12:30,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:30,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:30,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:30,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:30,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:30,197 INFO L87 Difference]: Start difference. First operand has 153 states, 73 states have (on average 2.3698630136986303) internal successors, (173), 144 states have internal predecessors, (173), 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) [2023-11-23 21:12:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:30,439 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2023-11-23 21:12:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:30,442 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 [2023-11-23 21:12:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:30,451 INFO L225 Difference]: With dead ends: 166 [2023-11-23 21:12:30,451 INFO L226 Difference]: Without dead ends: 165 [2023-11-23 21:12:30,453 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 [2023-11-23 21:12:30,457 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 127 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:30,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 93 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:12:30,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-23 21:12:30,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 140. [2023-11-23 21:12:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 65 states have (on average 2.2153846153846155) internal successors, (144), 138 states have internal predecessors, (144), 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) [2023-11-23 21:12:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2023-11-23 21:12:30,504 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 2 [2023-11-23 21:12:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:30,504 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2023-11-23 21:12:30,505 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) [2023-11-23 21:12:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2023-11-23 21:12:30,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-23 21:12:30,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:30,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-23 21:12:30,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:12:30,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:30,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:30,507 INFO L85 PathProgramCache]: Analyzing trace with hash 11639, now seen corresponding path program 1 times [2023-11-23 21:12:30,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:30,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514668957] [2023-11-23 21:12:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:30,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:30,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:30,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514668957] [2023-11-23 21:12:30,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514668957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:30,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:30,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:12:30,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044305026] [2023-11-23 21:12:30,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:30,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:30,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:30,619 INFO L87 Difference]: Start difference. First operand 140 states and 151 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) [2023-11-23 21:12:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:30,781 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2023-11-23 21:12:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:30,782 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 [2023-11-23 21:12:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:30,783 INFO L225 Difference]: With dead ends: 137 [2023-11-23 21:12:30,784 INFO L226 Difference]: Without dead ends: 137 [2023-11-23 21:12:30,784 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 [2023-11-23 21:12:30,786 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 135 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:30,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 79 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-23 21:12:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-11-23 21:12:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 65 states have (on average 2.169230769230769) internal successors, (141), 135 states have internal predecessors, (141), 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) [2023-11-23 21:12:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2023-11-23 21:12:30,798 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 2 [2023-11-23 21:12:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:30,799 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2023-11-23 21:12:30,799 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) [2023-11-23 21:12:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2023-11-23 21:12:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:12:30,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:30,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:12:30,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:12:30,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:30,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash 346702845, now seen corresponding path program 1 times [2023-11-23 21:12:30,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:30,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772514865] [2023-11-23 21:12:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:30,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:30,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:30,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772514865] [2023-11-23 21:12:30,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772514865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:30,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:30,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:12:30,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386252376] [2023-11-23 21:12:30,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:30,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:30,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:30,943 INFO L87 Difference]: Start difference. First operand 137 states and 148 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) [2023-11-23 21:12:31,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:31,111 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2023-11-23 21:12:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:31,112 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 [2023-11-23 21:12:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:31,115 INFO L225 Difference]: With dead ends: 135 [2023-11-23 21:12:31,116 INFO L226 Difference]: Without dead ends: 135 [2023-11-23 21:12:31,116 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 [2023-11-23 21:12:31,124 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 114 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:31,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 81 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:12:31,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-23 21:12:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2023-11-23 21:12:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 130 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) [2023-11-23 21:12:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 145 transitions. [2023-11-23 21:12:31,142 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 145 transitions. Word has length 5 [2023-11-23 21:12:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:31,142 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 145 transitions. [2023-11-23 21:12:31,142 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) [2023-11-23 21:12:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 145 transitions. [2023-11-23 21:12:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:12:31,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:31,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:12:31,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:12:31,144 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:31,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:31,145 INFO L85 PathProgramCache]: Analyzing trace with hash 346702846, now seen corresponding path program 1 times [2023-11-23 21:12:31,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:31,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307183754] [2023-11-23 21:12:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:31,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:31,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:31,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307183754] [2023-11-23 21:12:31,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307183754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:31,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:31,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:12:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978719932] [2023-11-23 21:12:31,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:31,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:31,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:31,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:31,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:31,287 INFO L87 Difference]: Start difference. First operand 132 states and 145 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) [2023-11-23 21:12:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:31,454 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2023-11-23 21:12:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:31,455 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 [2023-11-23 21:12:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:31,456 INFO L225 Difference]: With dead ends: 145 [2023-11-23 21:12:31,457 INFO L226 Difference]: Without dead ends: 145 [2023-11-23 21:12:31,457 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 [2023-11-23 21:12:31,461 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 109 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 87 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 [2023-11-23 21:12:31,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 87 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:12:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-23 21:12:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 134. [2023-11-23 21:12:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 72 states have (on average 1.9444444444444444) internal successors, (140), 132 states have internal predecessors, (140), 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) [2023-11-23 21:12:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 147 transitions. [2023-11-23 21:12:31,478 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 147 transitions. Word has length 5 [2023-11-23 21:12:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:31,479 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 147 transitions. [2023-11-23 21:12:31,479 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) [2023-11-23 21:12:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 147 transitions. [2023-11-23 21:12:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:12:31,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:31,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:31,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:12:31,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:31,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1246338220, now seen corresponding path program 1 times [2023-11-23 21:12:31,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:31,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043066635] [2023-11-23 21:12:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:31,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:31,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:31,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043066635] [2023-11-23 21:12:31,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043066635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:31,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:31,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:31,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384441398] [2023-11-23 21:12:31,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:31,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:12:31,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:31,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:12:31,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:31,732 INFO L87 Difference]: Start difference. First operand 134 states and 147 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) [2023-11-23 21:12:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:31,939 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2023-11-23 21:12:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:12:31,940 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 [2023-11-23 21:12:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:31,941 INFO L225 Difference]: With dead ends: 131 [2023-11-23 21:12:31,941 INFO L226 Difference]: Without dead ends: 131 [2023-11-23 21:12:31,941 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 [2023-11-23 21:12:31,942 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 172 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:31,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 66 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:12:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-23 21:12:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2023-11-23 21:12:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.7432432432432432) internal successors, (129), 119 states have internal predecessors, (129), 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) [2023-11-23 21:12:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2023-11-23 21:12:31,958 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 10 [2023-11-23 21:12:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:31,958 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2023-11-23 21:12:31,958 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) [2023-11-23 21:12:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2023-11-23 21:12:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:12:31,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:31,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:31,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:12:31,960 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:31,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:31,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1246338221, now seen corresponding path program 1 times [2023-11-23 21:12:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:31,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482375468] [2023-11-23 21:12:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:31,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:32,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:32,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482375468] [2023-11-23 21:12:32,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482375468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:32,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:32,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:32,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437994425] [2023-11-23 21:12:32,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:32,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:12:32,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:32,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:12:32,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:32,264 INFO L87 Difference]: Start difference. First operand 121 states and 136 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) [2023-11-23 21:12:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:32,530 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2023-11-23 21:12:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:12:32,531 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 [2023-11-23 21:12:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:32,532 INFO L225 Difference]: With dead ends: 150 [2023-11-23 21:12:32,532 INFO L226 Difference]: Without dead ends: 150 [2023-11-23 21:12:32,533 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 [2023-11-23 21:12:32,534 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 140 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 95 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 [2023-11-23 21:12:32,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 95 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:12:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-23 21:12:32,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 129. [2023-11-23 21:12:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 127 states have internal predecessors, (140), 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) [2023-11-23 21:12:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2023-11-23 21:12:32,542 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 10 [2023-11-23 21:12:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:32,542 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2023-11-23 21:12:32,543 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) [2023-11-23 21:12:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2023-11-23 21:12:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:12:32,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:32,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:32,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:12:32,544 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:32,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash -564564076, now seen corresponding path program 1 times [2023-11-23 21:12:32,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:32,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432032313] [2023-11-23 21:12:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:32,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:32,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:32,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432032313] [2023-11-23 21:12:32,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432032313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:32,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:32,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:12:32,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441918231] [2023-11-23 21:12:32,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:32,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:12:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:12:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:32,713 INFO L87 Difference]: Start difference. First operand 129 states and 147 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) [2023-11-23 21:12:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:32,887 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2023-11-23 21:12:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:12:32,887 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 [2023-11-23 21:12:32,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:32,888 INFO L225 Difference]: With dead ends: 128 [2023-11-23 21:12:32,888 INFO L226 Difference]: Without dead ends: 128 [2023-11-23 21:12:32,889 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 [2023-11-23 21:12:32,892 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:32,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 289 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:12:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-23 21:12:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-23 21:12:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 83 states have (on average 1.6626506024096386) internal successors, (138), 126 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) [2023-11-23 21:12:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 145 transitions. [2023-11-23 21:12:32,897 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 145 transitions. Word has length 12 [2023-11-23 21:12:32,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:32,898 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 145 transitions. [2023-11-23 21:12:32,898 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) [2023-11-23 21:12:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 145 transitions. [2023-11-23 21:12:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:12:32,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:32,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:32,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:12:32,900 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:32,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash -564564075, now seen corresponding path program 1 times [2023-11-23 21:12:32,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:32,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017349984] [2023-11-23 21:12:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:32,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:33,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:33,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017349984] [2023-11-23 21:12:33,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017349984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:33,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:33,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:12:33,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645332893] [2023-11-23 21:12:33,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:33,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:12:33,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:33,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:12:33,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:33,221 INFO L87 Difference]: Start difference. First operand 128 states and 145 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) [2023-11-23 21:12:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:33,431 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2023-11-23 21:12:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:12:33,432 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 [2023-11-23 21:12:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:33,433 INFO L225 Difference]: With dead ends: 127 [2023-11-23 21:12:33,433 INFO L226 Difference]: Without dead ends: 127 [2023-11-23 21:12:33,433 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 [2023-11-23 21:12:33,434 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 3 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 272 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 [2023-11-23 21:12:33,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 272 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:12:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-23 21:12:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-23 21:12:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.6385542168674698) internal successors, (136), 125 states have internal predecessors, (136), 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) [2023-11-23 21:12:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2023-11-23 21:12:33,439 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 12 [2023-11-23 21:12:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:33,440 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2023-11-23 21:12:33,440 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) [2023-11-23 21:12:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2023-11-23 21:12:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:12:33,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:33,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:33,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:12:33,444 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:33,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:33,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1600003297, now seen corresponding path program 1 times [2023-11-23 21:12:33,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:33,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679437571] [2023-11-23 21:12:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:33,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:33,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679437571] [2023-11-23 21:12:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679437571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:33,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:12:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125614440] [2023-11-23 21:12:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:33,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:12:33,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:33,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:12:33,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:33,574 INFO L87 Difference]: Start difference. First operand 127 states and 143 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) [2023-11-23 21:12:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:33,798 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2023-11-23 21:12:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:12:33,799 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 [2023-11-23 21:12:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:33,801 INFO L225 Difference]: With dead ends: 162 [2023-11-23 21:12:33,801 INFO L226 Difference]: Without dead ends: 162 [2023-11-23 21:12:33,802 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 [2023-11-23 21:12:33,802 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 240 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:33,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 134 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:12:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-23 21:12:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2023-11-23 21:12:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 83 states have (on average 1.6024096385542168) internal successors, (133), 124 states have internal predecessors, (133), 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) [2023-11-23 21:12:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 139 transitions. [2023-11-23 21:12:33,808 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 139 transitions. Word has length 14 [2023-11-23 21:12:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:33,808 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 139 transitions. [2023-11-23 21:12:33,808 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) [2023-11-23 21:12:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 139 transitions. [2023-11-23 21:12:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:12:33,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:33,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:33,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:12:33,810 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:33,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:33,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1379912389, now seen corresponding path program 1 times [2023-11-23 21:12:33,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:33,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654117245] [2023-11-23 21:12:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:33,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:34,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:34,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654117245] [2023-11-23 21:12:34,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654117245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:34,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:34,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:12:34,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626865139] [2023-11-23 21:12:34,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:34,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:12:34,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:34,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:12:34,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:12:34,158 INFO L87 Difference]: Start difference. First operand 126 states and 139 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) [2023-11-23 21:12:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:34,570 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2023-11-23 21:12:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:12:34,570 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 [2023-11-23 21:12:34,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:34,571 INFO L225 Difference]: With dead ends: 125 [2023-11-23 21:12:34,571 INFO L226 Difference]: Without dead ends: 125 [2023-11-23 21:12:34,572 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 [2023-11-23 21:12:34,572 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 149 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:34,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 191 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:12:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-23 21:12:34,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-23 21:12:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 83 states have (on average 1.5903614457831325) internal successors, (132), 123 states have internal predecessors, (132), 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) [2023-11-23 21:12:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2023-11-23 21:12:34,576 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 14 [2023-11-23 21:12:34,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:34,577 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2023-11-23 21:12:34,577 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) [2023-11-23 21:12:34,577 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2023-11-23 21:12:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:12:34,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:34,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:34,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:12:34,578 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:34,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1379912388, now seen corresponding path program 1 times [2023-11-23 21:12:34,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:34,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159835278] [2023-11-23 21:12:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:34,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:35,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:35,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159835278] [2023-11-23 21:12:35,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159835278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:35,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:35,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:12:35,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493446270] [2023-11-23 21:12:35,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:35,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:12:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:35,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:12:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:12:35,014 INFO L87 Difference]: Start difference. First operand 125 states and 138 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) [2023-11-23 21:12:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:35,543 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2023-11-23 21:12:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:12:35,544 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 [2023-11-23 21:12:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:35,545 INFO L225 Difference]: With dead ends: 137 [2023-11-23 21:12:35,545 INFO L226 Difference]: Without dead ends: 137 [2023-11-23 21:12:35,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:12:35,546 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 185 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:35,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 208 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:12:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-23 21:12:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 127. [2023-11-23 21:12:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 125 states have internal predecessors, (137), 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) [2023-11-23 21:12:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2023-11-23 21:12:35,551 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 14 [2023-11-23 21:12:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:35,551 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2023-11-23 21:12:35,552 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) [2023-11-23 21:12:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2023-11-23 21:12:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:12:35,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:35,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:35,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:12:35,553 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:35,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:35,554 INFO L85 PathProgramCache]: Analyzing trace with hash -788386787, now seen corresponding path program 1 times [2023-11-23 21:12:35,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:35,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999578748] [2023-11-23 21:12:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:35,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:35,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:35,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999578748] [2023-11-23 21:12:35,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999578748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:35,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:35,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:12:35,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347438740] [2023-11-23 21:12:35,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:35,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:12:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:35,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:12:35,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:12:35,872 INFO L87 Difference]: Start difference. First operand 127 states and 143 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) [2023-11-23 21:12:36,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:36,213 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2023-11-23 21:12:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:12:36,213 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 [2023-11-23 21:12:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:36,215 INFO L225 Difference]: With dead ends: 177 [2023-11-23 21:12:36,215 INFO L226 Difference]: Without dead ends: 177 [2023-11-23 21:12:36,215 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 [2023-11-23 21:12:36,216 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 232 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:36,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 237 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:12:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-23 21:12:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2023-11-23 21:12:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 132 states have internal predecessors, (145), 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) [2023-11-23 21:12:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2023-11-23 21:12:36,222 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 17 [2023-11-23 21:12:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:36,223 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2023-11-23 21:12:36,223 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) [2023-11-23 21:12:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2023-11-23 21:12:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:12:36,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:36,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:36,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 21:12:36,225 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:36,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:36,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1577864059, now seen corresponding path program 1 times [2023-11-23 21:12:36,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:36,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043447746] [2023-11-23 21:12:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:36,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:36,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:36,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043447746] [2023-11-23 21:12:36,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043447746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:36,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:36,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:12:36,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654149722] [2023-11-23 21:12:36,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:36,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:12:36,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:36,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:12:36,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:36,398 INFO L87 Difference]: Start difference. First operand 134 states and 151 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) [2023-11-23 21:12:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:36,555 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2023-11-23 21:12:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:12:36,556 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 [2023-11-23 21:12:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:36,557 INFO L225 Difference]: With dead ends: 133 [2023-11-23 21:12:36,558 INFO L226 Difference]: Without dead ends: 133 [2023-11-23 21:12:36,558 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 [2023-11-23 21:12:36,558 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 3 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:36,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 265 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-23 21:12:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-11-23 21:12:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 98 states have (on average 1.469387755102041) internal successors, (144), 131 states have internal predecessors, (144), 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) [2023-11-23 21:12:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2023-11-23 21:12:36,563 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 19 [2023-11-23 21:12:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:36,564 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2023-11-23 21:12:36,564 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) [2023-11-23 21:12:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2023-11-23 21:12:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:12:36,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:36,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:36,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 21:12:36,565 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:36,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1577864058, now seen corresponding path program 1 times [2023-11-23 21:12:36,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:36,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241287104] [2023-11-23 21:12:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:36,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:36,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241287104] [2023-11-23 21:12:36,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241287104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:36,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:36,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:12:36,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831528967] [2023-11-23 21:12:36,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:36,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:12:36,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:36,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:12:36,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:36,823 INFO L87 Difference]: Start difference. First operand 133 states and 150 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) [2023-11-23 21:12:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:36,997 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2023-11-23 21:12:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:12:36,998 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 [2023-11-23 21:12:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:36,999 INFO L225 Difference]: With dead ends: 132 [2023-11-23 21:12:36,999 INFO L226 Difference]: Without dead ends: 132 [2023-11-23 21:12:36,999 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 [2023-11-23 21:12:37,000 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 1 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 253 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 [2023-11-23 21:12:37,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 253 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:12:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-23 21:12:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-23 21:12:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.4591836734693877) internal successors, (143), 130 states have internal predecessors, (143), 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) [2023-11-23 21:12:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2023-11-23 21:12:37,004 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 19 [2023-11-23 21:12:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:37,005 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2023-11-23 21:12:37,005 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) [2023-11-23 21:12:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2023-11-23 21:12:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:12:37,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:37,006 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] [2023-11-23 21:12:37,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 21:12:37,006 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:37,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:37,007 INFO L85 PathProgramCache]: Analyzing trace with hash -14600253, now seen corresponding path program 1 times [2023-11-23 21:12:37,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:37,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130360021] [2023-11-23 21:12:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:37,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:37,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:37,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130360021] [2023-11-23 21:12:37,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130360021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:37,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:37,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:12:37,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622071816] [2023-11-23 21:12:37,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:37,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:12:37,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:37,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:12:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:37,137 INFO L87 Difference]: Start difference. First operand 132 states and 149 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) [2023-11-23 21:12:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:37,249 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2023-11-23 21:12:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:12:37,250 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 [2023-11-23 21:12:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:37,252 INFO L225 Difference]: With dead ends: 131 [2023-11-23 21:12:37,252 INFO L226 Difference]: Without dead ends: 131 [2023-11-23 21:12:37,254 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 [2023-11-23 21:12:37,254 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 18 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 192 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 [2023-11-23 21:12:37,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 192 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-23 21:12:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-23 21:12:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 129 states have internal predecessors, (141), 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) [2023-11-23 21:12:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2023-11-23 21:12:37,260 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 21 [2023-11-23 21:12:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:37,260 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2023-11-23 21:12:37,260 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) [2023-11-23 21:12:37,261 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2023-11-23 21:12:37,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:12:37,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:37,262 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] [2023-11-23 21:12:37,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 21:12:37,263 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:12:37,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 941654992, now seen corresponding path program 1 times [2023-11-23 21:12:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:37,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859088980] [2023-11-23 21:12:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:37,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:37,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859088980] [2023-11-23 21:12:37,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859088980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:12:37,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652617958] [2023-11-23 21:12:37,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:37,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:37,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:37,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:12:37,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb8bfae-6f19-45e4-988d-8fdb3d20ba49/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:12:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:37,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 21:12:37,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:12:37,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:12:37,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:12:37,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 21:12:37,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 21:12:37,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 21:12:37,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 21:12:38,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:12:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:38,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:12:38,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:12:38,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-23 21:12:38,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:12:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652617958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:12:38,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488399020] [2023-11-23 21:12:38,623 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-23 21:12:38,623 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:12:38,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:12:38,633 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:12:38,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:12:39,576 INFO L180 IcfgInterpreter]: Interpretation finished