./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:30:32,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:30:33,026 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:30:33,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:30:33,034 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:30:33,077 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:30:33,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:30:33,080 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:30:33,081 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:30:33,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:30:33,089 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:30:33,090 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:30:33,091 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:30:33,093 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:30:33,093 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:30:33,094 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:30:33,094 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:30:33,095 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:30:33,095 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:30:33,096 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:30:33,096 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:30:33,097 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:30:33,097 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:30:33,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:30:33,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:30:33,099 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:30:33,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:30:33,100 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:30:33,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:30:33,101 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:30:33,102 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:30:33,102 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:30:33,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:30:33,103 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:30:33,103 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:30:33,104 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:30:33,104 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:30:33,104 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:30:33,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:30:33,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:30:33,105 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:30:33,105 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:30:33,106 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:30:33,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:30:33,106 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:30:33,107 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:30:33,107 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_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab [2023-11-06 20:30:33,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:30:33,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:30:33,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:30:33,416 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:30:33,418 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:30:33,419 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2023-11-06 20:30:36,591 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:30:36,944 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:30:36,945 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2023-11-06 20:30:36,968 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/data/a362abebe/089211ef7ff74cd6a52bf4f7b4fce697/FLAG677a8c9f5 [2023-11-06 20:30:36,986 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/data/a362abebe/089211ef7ff74cd6a52bf4f7b4fce697 [2023-11-06 20:30:36,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:30:36,990 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:30:36,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:30:36,992 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:30:36,997 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:30:36,998 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:30:36" (1/1) ... [2023-11-06 20:30:37,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41bf9c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:36, skipping insertion in model container [2023-11-06 20:30:37,000 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:30:36" (1/1) ... [2023-11-06 20:30:37,085 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:30:37,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:30:37,600 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:30:37,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:30:37,728 WARN L672 CHandler]: The function strncpy is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:30:37,734 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:30:37,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37 WrapperNode [2023-11-06 20:30:37,735 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:30:37,736 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:30:37,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:30:37,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:30:37,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,767 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,806 INFO L138 Inliner]: procedures = 184, calls = 150, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 229 [2023-11-06 20:30:37,807 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:30:37,807 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:30:37,808 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:30:37,808 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:30:37,827 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,851 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,880 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,889 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,899 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:30:37,900 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:30:37,900 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:30:37,900 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:30:37,907 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (1/1) ... [2023-11-06 20:30:37,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:30:37,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:30:37,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:30:38,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3abd5988-a559-4d99-9196-fc6c8c027529/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:30:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:30:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-06 20:30:38,021 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-06 20:30:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure event_precess [2023-11-06 20:30:38,022 INFO L138 BoogieDeclarations]: Found implementation of procedure event_precess [2023-11-06 20:30:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:30:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:30:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure ASNull [2023-11-06 20:30:38,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ASNull [2023-11-06 20:30:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:30:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:30:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:30:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure ASStart [2023-11-06 20:30:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStart [2023-11-06 20:30:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure status_update [2023-11-06 20:30:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure status_update [2023-11-06 20:30:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure message_send [2023-11-06 20:30:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure message_send [2023-11-06 20:30:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:30:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure ASIdle [2023-11-06 20:30:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ASIdle [2023-11-06 20:30:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:30:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure system_initialize [2023-11-06 20:30:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure system_initialize [2023-11-06 20:30:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:30:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure ASStop [2023-11-06 20:30:38,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStop [2023-11-06 20:30:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2023-11-06 20:30:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:30:38,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:30:38,297 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:30:38,300 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:30:39,362 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:30:39,454 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:30:39,454 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 20:30:39,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:30:39 BoogieIcfgContainer [2023-11-06 20:30:39,460 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:30:39,463 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:30:39,464 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:30:39,468 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:30:39,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:30:36" (1/3) ... [2023-11-06 20:30:39,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7922248a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:30:39, skipping insertion in model container [2023-11-06 20:30:39,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:37" (2/3) ... [2023-11-06 20:30:39,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7922248a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:30:39, skipping insertion in model container [2023-11-06 20:30:39,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:30:39" (3/3) ... [2023-11-06 20:30:39,471 INFO L112 eAbstractionObserver]: Analyzing ICFG system-with-recursion.i [2023-11-06 20:30:39,488 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:30:39,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 162 error locations. [2023-11-06 20:30:39,543 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:30:39,550 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@79eca8df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:30:39,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 162 error locations. [2023-11-06 20:30:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 358 states, 157 states have (on average 2.1910828025477707) internal successors, (344), 319 states have internal predecessors, (344), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-06 20:30:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 20:30:39,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:39,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 20:30:39,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:39,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 589464126, now seen corresponding path program 1 times [2023-11-06 20:30:39,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:39,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665238266] [2023-11-06 20:30:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:39,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:39,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665238266] [2023-11-06 20:30:39,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665238266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:39,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:39,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:30:39,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780725818] [2023-11-06 20:30:39,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:39,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:39,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:40,038 INFO L87 Difference]: Start difference. First operand has 358 states, 157 states have (on average 2.1910828025477707) internal successors, (344), 319 states have internal predecessors, (344), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:40,616 INFO L93 Difference]: Finished difference Result 382 states and 443 transitions. [2023-11-06 20:30:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 5 [2023-11-06 20:30:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:40,641 INFO L225 Difference]: With dead ends: 382 [2023-11-06 20:30:40,642 INFO L226 Difference]: Without dead ends: 381 [2023-11-06 20:30:40,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:40,649 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 356 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:40,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 235 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:30:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-06 20:30:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 352. [2023-11-06 20:30:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 170 states have (on average 2.0) internal successors, (340), 308 states have internal predecessors, (340), 32 states have call successors, (32), 11 states have call predecessors, (32), 11 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2023-11-06 20:30:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 409 transitions. [2023-11-06 20:30:40,756 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 409 transitions. Word has length 5 [2023-11-06 20:30:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:40,757 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 409 transitions. [2023-11-06 20:30:40,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 409 transitions. [2023-11-06 20:30:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 20:30:40,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:40,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 20:30:40,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:30:40,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:40,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash 589464127, now seen corresponding path program 1 times [2023-11-06 20:30:40,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:40,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178566079] [2023-11-06 20:30:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:40,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:41,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:41,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178566079] [2023-11-06 20:30:41,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178566079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:41,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:41,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:30:41,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146731563] [2023-11-06 20:30:41,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:41,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:30:41,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:41,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:30:41,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:30:41,036 INFO L87 Difference]: Start difference. First operand 352 states and 409 transitions. Second operand has 4 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:41,704 INFO L93 Difference]: Finished difference Result 433 states and 517 transitions. [2023-11-06 20:30:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:30:41,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 5 [2023-11-06 20:30:41,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:41,713 INFO L225 Difference]: With dead ends: 433 [2023-11-06 20:30:41,713 INFO L226 Difference]: Without dead ends: 433 [2023-11-06 20:30:41,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:30:41,715 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 114 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:41,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 642 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 20:30:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-06 20:30:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 412. [2023-11-06 20:30:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 219 states have (on average 1.8721461187214612) internal successors, (410), 353 states have internal predecessors, (410), 42 states have call successors, (42), 18 states have call predecessors, (42), 18 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2023-11-06 20:30:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 506 transitions. [2023-11-06 20:30:41,762 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 506 transitions. Word has length 5 [2023-11-06 20:30:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:41,766 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 506 transitions. [2023-11-06 20:30:41,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 506 transitions. [2023-11-06 20:30:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 20:30:41,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:41,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:41,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:30:41,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:41,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:41,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1395036813, now seen corresponding path program 1 times [2023-11-06 20:30:41,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:41,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903719699] [2023-11-06 20:30:41,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:41,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:41,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:41,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903719699] [2023-11-06 20:30:41,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903719699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:41,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:41,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:30:41,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841119674] [2023-11-06 20:30:41,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:41,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:30:41,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:41,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:30:41,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:30:41,967 INFO L87 Difference]: Start difference. First operand 412 states and 506 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:42,512 INFO L93 Difference]: Finished difference Result 411 states and 505 transitions. [2023-11-06 20:30:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:30:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-06 20:30:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:42,516 INFO L225 Difference]: With dead ends: 411 [2023-11-06 20:30:42,517 INFO L226 Difference]: Without dead ends: 411 [2023-11-06 20:30:42,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:30:42,518 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 10 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:42,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 899 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 20:30:42,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-11-06 20:30:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2023-11-06 20:30:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 219 states have (on average 1.8675799086757991) internal successors, (409), 352 states have internal predecessors, (409), 42 states have call successors, (42), 18 states have call predecessors, (42), 18 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2023-11-06 20:30:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 505 transitions. [2023-11-06 20:30:42,553 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 505 transitions. Word has length 8 [2023-11-06 20:30:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:42,553 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 505 transitions. [2023-11-06 20:30:42,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 505 transitions. [2023-11-06 20:30:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 20:30:42,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:42,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:42,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:30:42,554 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:42,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1395036812, now seen corresponding path program 1 times [2023-11-06 20:30:42,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:42,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793872512] [2023-11-06 20:30:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:42,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:42,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:42,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793872512] [2023-11-06 20:30:42,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793872512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:42,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:42,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:30:42,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542685047] [2023-11-06 20:30:42,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:42,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:30:42,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:42,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:30:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:30:42,846 INFO L87 Difference]: Start difference. First operand 411 states and 505 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:43,425 INFO L93 Difference]: Finished difference Result 410 states and 504 transitions. [2023-11-06 20:30:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:30:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-06 20:30:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:43,429 INFO L225 Difference]: With dead ends: 410 [2023-11-06 20:30:43,429 INFO L226 Difference]: Without dead ends: 410 [2023-11-06 20:30:43,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:30:43,431 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 7 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:43,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 877 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 20:30:43,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-06 20:30:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2023-11-06 20:30:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 219 states have (on average 1.8630136986301369) internal successors, (408), 351 states have internal predecessors, (408), 42 states have call successors, (42), 18 states have call predecessors, (42), 18 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2023-11-06 20:30:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 504 transitions. [2023-11-06 20:30:43,450 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 504 transitions. Word has length 8 [2023-11-06 20:30:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:43,450 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 504 transitions. [2023-11-06 20:30:43,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 504 transitions. [2023-11-06 20:30:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 20:30:43,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:43,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:43,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:30:43,452 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:43,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1515620074, now seen corresponding path program 1 times [2023-11-06 20:30:43,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:43,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283503621] [2023-11-06 20:30:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:43,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:43,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:43,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283503621] [2023-11-06 20:30:43,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283503621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:43,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:43,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:30:43,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027427932] [2023-11-06 20:30:43,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:43,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:43,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:43,525 INFO L87 Difference]: Start difference. First operand 410 states and 504 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:43,802 INFO L93 Difference]: Finished difference Result 409 states and 503 transitions. [2023-11-06 20:30:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-06 20:30:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:43,807 INFO L225 Difference]: With dead ends: 409 [2023-11-06 20:30:43,807 INFO L226 Difference]: Without dead ends: 409 [2023-11-06 20:30:43,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:43,808 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 2 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:43,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 518 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:30:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-11-06 20:30:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2023-11-06 20:30:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 219 states have (on average 1.8584474885844748) internal successors, (407), 350 states have internal predecessors, (407), 42 states have call successors, (42), 18 states have call predecessors, (42), 18 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2023-11-06 20:30:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 503 transitions. [2023-11-06 20:30:43,834 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 503 transitions. Word has length 12 [2023-11-06 20:30:43,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:43,834 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 503 transitions. [2023-11-06 20:30:43,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 503 transitions. [2023-11-06 20:30:43,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 20:30:43,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:43,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:43,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:30:43,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:43,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1515620073, now seen corresponding path program 1 times [2023-11-06 20:30:43,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:43,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673351902] [2023-11-06 20:30:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:43,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:43,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:43,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673351902] [2023-11-06 20:30:43,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673351902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:43,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:43,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:30:43,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636742698] [2023-11-06 20:30:43,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:43,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:43,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:43,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:43,941 INFO L87 Difference]: Start difference. First operand 409 states and 503 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:44,225 INFO L93 Difference]: Finished difference Result 408 states and 502 transitions. [2023-11-06 20:30:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:44,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-06 20:30:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:44,230 INFO L225 Difference]: With dead ends: 408 [2023-11-06 20:30:44,231 INFO L226 Difference]: Without dead ends: 408 [2023-11-06 20:30:44,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:44,232 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:44,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 504 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:30:44,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-06 20:30:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2023-11-06 20:30:44,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 219 states have (on average 1.8538812785388128) internal successors, (406), 349 states have internal predecessors, (406), 42 states have call successors, (42), 18 states have call predecessors, (42), 18 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2023-11-06 20:30:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 502 transitions. [2023-11-06 20:30:44,255 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 502 transitions. Word has length 12 [2023-11-06 20:30:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:44,256 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 502 transitions. [2023-11-06 20:30:44,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 502 transitions. [2023-11-06 20:30:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 20:30:44,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:44,257 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] [2023-11-06 20:30:44,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:30:44,259 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ASNullErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:44,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1434793994, now seen corresponding path program 1 times [2023-11-06 20:30:44,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:44,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240201618] [2023-11-06 20:30:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:44,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:44,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:44,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240201618] [2023-11-06 20:30:44,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240201618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:44,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:44,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:30:44,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116894953] [2023-11-06 20:30:44,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:44,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:30:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:30:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:30:44,448 INFO L87 Difference]: Start difference. First operand 408 states and 502 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:45,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:45,157 INFO L93 Difference]: Finished difference Result 438 states and 547 transitions. [2023-11-06 20:30:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 20:30:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-06 20:30:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:45,162 INFO L225 Difference]: With dead ends: 438 [2023-11-06 20:30:45,163 INFO L226 Difference]: Without dead ends: 438 [2023-11-06 20:30:45,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:30:45,165 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 44 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:45,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1244 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 20:30:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-06 20:30:45,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 427. [2023-11-06 20:30:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 234 states have (on average 1.829059829059829) internal successors, (428), 365 states have internal predecessors, (428), 43 states have call successors, (43), 20 states have call predecessors, (43), 21 states have return successors, (58), 41 states have call predecessors, (58), 43 states have call successors, (58) [2023-11-06 20:30:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 529 transitions. [2023-11-06 20:30:45,188 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 529 transitions. Word has length 20 [2023-11-06 20:30:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:45,188 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 529 transitions. [2023-11-06 20:30:45,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 529 transitions. [2023-11-06 20:30:45,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 20:30:45,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:45,190 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] [2023-11-06 20:30:45,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:30:45,190 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ASNullErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:45,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:45,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1434793993, now seen corresponding path program 1 times [2023-11-06 20:30:45,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:45,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144233950] [2023-11-06 20:30:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:45,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:45,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:45,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144233950] [2023-11-06 20:30:45,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144233950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:45,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:45,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:30:45,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326347160] [2023-11-06 20:30:45,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:45,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:30:45,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:30:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:30:45,571 INFO L87 Difference]: Start difference. First operand 427 states and 529 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:46,408 INFO L93 Difference]: Finished difference Result 437 states and 546 transitions. [2023-11-06 20:30:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:30:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-06 20:30:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:46,412 INFO L225 Difference]: With dead ends: 437 [2023-11-06 20:30:46,412 INFO L226 Difference]: Without dead ends: 437 [2023-11-06 20:30:46,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:30:46,413 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 38 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:46,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1184 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 20:30:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-11-06 20:30:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 427. [2023-11-06 20:30:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 234 states have (on average 1.8247863247863247) internal successors, (427), 365 states have internal predecessors, (427), 43 states have call successors, (43), 20 states have call predecessors, (43), 21 states have return successors, (58), 41 states have call predecessors, (58), 43 states have call successors, (58) [2023-11-06 20:30:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 528 transitions. [2023-11-06 20:30:46,430 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 528 transitions. Word has length 20 [2023-11-06 20:30:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:46,430 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 528 transitions. [2023-11-06 20:30:46,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 528 transitions. [2023-11-06 20:30:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 20:30:46,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:46,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:46,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:30:46,432 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:46,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1540239653, now seen corresponding path program 1 times [2023-11-06 20:30:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:46,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357226460] [2023-11-06 20:30:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:46,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:46,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:46,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357226460] [2023-11-06 20:30:46,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357226460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:46,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:46,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:30:46,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891040402] [2023-11-06 20:30:46,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:46,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:30:46,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:46,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:30:46,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:30:46,629 INFO L87 Difference]: Start difference. First operand 427 states and 528 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:47,420 INFO L93 Difference]: Finished difference Result 523 states and 664 transitions. [2023-11-06 20:30:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 20:30:47,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-06 20:30:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:47,425 INFO L225 Difference]: With dead ends: 523 [2023-11-06 20:30:47,425 INFO L226 Difference]: Without dead ends: 523 [2023-11-06 20:30:47,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:30:47,426 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 160 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:47,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1186 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 20:30:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-11-06 20:30:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 459. [2023-11-06 20:30:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 257 states have (on average 1.8054474708171206) internal successors, (464), 391 states have internal predecessors, (464), 49 states have call successors, (49), 24 states have call predecessors, (49), 24 states have return successors, (70), 43 states have call predecessors, (70), 49 states have call successors, (70) [2023-11-06 20:30:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 583 transitions. [2023-11-06 20:30:47,445 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 583 transitions. Word has length 21 [2023-11-06 20:30:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:47,446 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 583 transitions. [2023-11-06 20:30:47,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 583 transitions. [2023-11-06 20:30:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 20:30:47,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:47,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:47,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 20:30:47,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:47,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:47,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1540239652, now seen corresponding path program 1 times [2023-11-06 20:30:47,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:47,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179636861] [2023-11-06 20:30:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:47,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:47,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:47,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179636861] [2023-11-06 20:30:47,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179636861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:47,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:47,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 20:30:47,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15561322] [2023-11-06 20:30:47,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:47,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 20:30:47,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:47,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 20:30:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:30:47,779 INFO L87 Difference]: Start difference. First operand 459 states and 583 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:48,587 INFO L93 Difference]: Finished difference Result 442 states and 529 transitions. [2023-11-06 20:30:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 20:30:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-06 20:30:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:48,591 INFO L225 Difference]: With dead ends: 442 [2023-11-06 20:30:48,591 INFO L226 Difference]: Without dead ends: 442 [2023-11-06 20:30:48,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-06 20:30:48,592 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 426 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:48,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 715 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 20:30:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-11-06 20:30:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 392. [2023-11-06 20:30:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 206 states have (on average 1.8446601941747574) internal successors, (380), 339 states have internal predecessors, (380), 39 states have call successors, (39), 18 states have call predecessors, (39), 18 states have return successors, (51), 34 states have call predecessors, (51), 39 states have call successors, (51) [2023-11-06 20:30:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2023-11-06 20:30:48,607 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 21 [2023-11-06 20:30:48,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:48,608 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2023-11-06 20:30:48,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2023-11-06 20:30:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 20:30:48,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:48,610 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:48,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 20:30:48,610 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:48,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:48,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1632919712, now seen corresponding path program 1 times [2023-11-06 20:30:48,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:48,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825996690] [2023-11-06 20:30:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:48,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:48,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:48,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825996690] [2023-11-06 20:30:48,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825996690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:48,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:48,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:30:48,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257335510] [2023-11-06 20:30:48,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:48,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:30:48,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:48,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:30:48,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:30:48,708 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:30:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:48,872 INFO L93 Difference]: Finished difference Result 403 states and 481 transitions. [2023-11-06 20:30:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:30:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-06 20:30:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:48,876 INFO L225 Difference]: With dead ends: 403 [2023-11-06 20:30:48,876 INFO L226 Difference]: Without dead ends: 401 [2023-11-06 20:30:48,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:30:48,877 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 20 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:48,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 907 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:30:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-11-06 20:30:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 399. [2023-11-06 20:30:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 212 states have (on average 1.8349056603773586) internal successors, (389), 345 states have internal predecessors, (389), 39 states have call successors, (39), 19 states have call predecessors, (39), 19 states have return successors, (51), 34 states have call predecessors, (51), 39 states have call successors, (51) [2023-11-06 20:30:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 479 transitions. [2023-11-06 20:30:48,890 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 479 transitions. Word has length 30 [2023-11-06 20:30:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:48,891 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 479 transitions. [2023-11-06 20:30:48,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:30:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 479 transitions. [2023-11-06 20:30:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 20:30:48,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:48,896 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:48,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 20:30:48,896 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:48,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:48,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1863406002, now seen corresponding path program 1 times [2023-11-06 20:30:48,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:48,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784055562] [2023-11-06 20:30:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:48,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:49,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:49,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784055562] [2023-11-06 20:30:49,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784055562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:49,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:49,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 20:30:49,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613363581] [2023-11-06 20:30:49,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:49,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:30:49,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:30:49,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:30:49,235 INFO L87 Difference]: Start difference. First operand 399 states and 479 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:50,092 INFO L93 Difference]: Finished difference Result 442 states and 562 transitions. [2023-11-06 20:30:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 20:30:50,093 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-11-06 20:30:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:50,096 INFO L225 Difference]: With dead ends: 442 [2023-11-06 20:30:50,096 INFO L226 Difference]: Without dead ends: 436 [2023-11-06 20:30:50,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:30:50,097 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 133 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:50,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1907 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 20:30:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-11-06 20:30:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 399. [2023-11-06 20:30:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 212 states have (on average 1.830188679245283) internal successors, (388), 345 states have internal predecessors, (388), 39 states have call successors, (39), 19 states have call predecessors, (39), 19 states have return successors, (51), 34 states have call predecessors, (51), 39 states have call successors, (51) [2023-11-06 20:30:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 478 transitions. [2023-11-06 20:30:50,113 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 478 transitions. Word has length 29 [2023-11-06 20:30:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:50,113 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 478 transitions. [2023-11-06 20:30:50,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 478 transitions. [2023-11-06 20:30:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 20:30:50,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:50,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:50,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 20:30:50,115 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:50,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1640573506, now seen corresponding path program 1 times [2023-11-06 20:30:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:50,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297402675] [2023-11-06 20:30:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:50,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:50,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:50,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297402675] [2023-11-06 20:30:50,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297402675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:50,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:50,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 20:30:50,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299239159] [2023-11-06 20:30:50,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:50,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:30:50,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:50,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:30:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:30:50,388 INFO L87 Difference]: Start difference. First operand 399 states and 478 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:30:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:51,540 INFO L93 Difference]: Finished difference Result 600 states and 818 transitions. [2023-11-06 20:30:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 20:30:51,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-06 20:30:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:51,546 INFO L225 Difference]: With dead ends: 600 [2023-11-06 20:30:51,546 INFO L226 Difference]: Without dead ends: 594 [2023-11-06 20:30:51,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-11-06 20:30:51,547 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 298 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:51,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1429 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 20:30:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2023-11-06 20:30:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 552. [2023-11-06 20:30:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 327 states have (on average 1.672782874617737) internal successors, (547), 453 states have internal predecessors, (547), 55 states have call successors, (55), 29 states have call predecessors, (55), 41 states have return successors, (178), 69 states have call predecessors, (178), 55 states have call successors, (178) [2023-11-06 20:30:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 780 transitions. [2023-11-06 20:30:51,578 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 780 transitions. Word has length 32 [2023-11-06 20:30:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:51,578 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 780 transitions. [2023-11-06 20:30:51,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:30:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 780 transitions. [2023-11-06 20:30:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-06 20:30:51,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:51,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:51,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 20:30:51,580 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:51,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:51,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1069311814, now seen corresponding path program 1 times [2023-11-06 20:30:51,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:51,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130628174] [2023-11-06 20:30:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:51,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:52,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:52,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130628174] [2023-11-06 20:30:52,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130628174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:52,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:52,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 20:30:52,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795083655] [2023-11-06 20:30:52,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 20:30:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 20:30:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:30:52,005 INFO L87 Difference]: Start difference. First operand 552 states and 780 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:30:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:52,739 INFO L93 Difference]: Finished difference Result 581 states and 842 transitions. [2023-11-06 20:30:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:30:52,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-11-06 20:30:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:52,745 INFO L225 Difference]: With dead ends: 581 [2023-11-06 20:30:52,745 INFO L226 Difference]: Without dead ends: 581 [2023-11-06 20:30:52,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:30:52,746 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 646 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:52,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 294 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 20:30:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2023-11-06 20:30:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 556. [2023-11-06 20:30:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 345 states have (on average 1.5478260869565217) internal successors, (534), 446 states have internal predecessors, (534), 55 states have call successors, (55), 29 states have call predecessors, (55), 46 states have return successors, (207), 80 states have call predecessors, (207), 55 states have call successors, (207) [2023-11-06 20:30:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 796 transitions. [2023-11-06 20:30:52,782 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 796 transitions. Word has length 33 [2023-11-06 20:30:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:52,783 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 796 transitions. [2023-11-06 20:30:52,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:30:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 796 transitions. [2023-11-06 20:30:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 20:30:52,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:52,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:52,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 20:30:52,788 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting system_initializeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:52,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:52,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1211072226, now seen corresponding path program 1 times [2023-11-06 20:30:52,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:52,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149783285] [2023-11-06 20:30:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:52,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:53,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:53,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149783285] [2023-11-06 20:30:53,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149783285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:53,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:53,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 20:30:53,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825256836] [2023-11-06 20:30:53,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:53,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 20:30:53,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 20:30:53,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:30:53,898 INFO L87 Difference]: Start difference. First operand 556 states and 796 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:30:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:55,469 INFO L93 Difference]: Finished difference Result 608 states and 899 transitions. [2023-11-06 20:30:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 20:30:55,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-11-06 20:30:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:55,475 INFO L225 Difference]: With dead ends: 608 [2023-11-06 20:30:55,476 INFO L226 Difference]: Without dead ends: 608 [2023-11-06 20:30:55,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:30:55,477 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 338 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:55,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1502 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 20:30:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2023-11-06 20:30:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 561. [2023-11-06 20:30:55,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 349 states have (on average 1.5444126074498568) internal successors, (539), 449 states have internal predecessors, (539), 56 states have call successors, (56), 30 states have call predecessors, (56), 46 states have return successors, (209), 81 states have call predecessors, (209), 56 states have call successors, (209) [2023-11-06 20:30:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 804 transitions. [2023-11-06 20:30:55,510 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 804 transitions. Word has length 34 [2023-11-06 20:30:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:55,510 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 804 transitions. [2023-11-06 20:30:55,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:30:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 804 transitions. [2023-11-06 20:30:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 20:30:55,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:55,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:55,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 20:30:55,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting system_initializeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:55,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1211072227, now seen corresponding path program 1 times [2023-11-06 20:30:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:55,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646261885] [2023-11-06 20:30:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:57,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:57,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646261885] [2023-11-06 20:30:57,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646261885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:57,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:57,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 20:30:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171987819] [2023-11-06 20:30:57,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:57,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 20:30:57,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 20:30:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-06 20:30:57,111 INFO L87 Difference]: Start difference. First operand 561 states and 804 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:30:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:58,587 INFO L93 Difference]: Finished difference Result 607 states and 898 transitions. [2023-11-06 20:30:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 20:30:58,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-11-06 20:30:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:58,593 INFO L225 Difference]: With dead ends: 607 [2023-11-06 20:30:58,594 INFO L226 Difference]: Without dead ends: 607 [2023-11-06 20:30:58,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:30:58,595 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 352 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:58,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1082 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 20:30:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2023-11-06 20:30:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 561. [2023-11-06 20:30:58,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 349 states have (on average 1.5415472779369628) internal successors, (538), 449 states have internal predecessors, (538), 56 states have call successors, (56), 30 states have call predecessors, (56), 46 states have return successors, (209), 81 states have call predecessors, (209), 56 states have call successors, (209) [2023-11-06 20:30:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 803 transitions. [2023-11-06 20:30:58,631 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 803 transitions. Word has length 34 [2023-11-06 20:30:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:58,632 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 803 transitions. [2023-11-06 20:30:58,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:30:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 803 transitions. [2023-11-06 20:30:58,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-06 20:30:58,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:58,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:58,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 20:30:58,634 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting system_initializeErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:58,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:58,634 INFO L85 PathProgramCache]: Analyzing trace with hash -95723773, now seen corresponding path program 1 times [2023-11-06 20:30:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:58,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537707143] [2023-11-06 20:30:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:58,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:58,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:58,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537707143] [2023-11-06 20:30:58,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537707143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:58,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:58,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:30:58,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963299129] [2023-11-06 20:30:58,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:58,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:58,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:58,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:58,734 INFO L87 Difference]: Start difference. First operand 561 states and 803 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:30:59,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:59,007 INFO L93 Difference]: Finished difference Result 559 states and 801 transitions. [2023-11-06 20:30:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:59,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-11-06 20:30:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:59,012 INFO L225 Difference]: With dead ends: 559 [2023-11-06 20:30:59,012 INFO L226 Difference]: Without dead ends: 559 [2023-11-06 20:30:59,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:59,013 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 7 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:59,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 467 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:30:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-11-06 20:30:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2023-11-06 20:30:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 349 states have (on average 1.5358166189111748) internal successors, (536), 447 states have internal predecessors, (536), 56 states have call successors, (56), 30 states have call predecessors, (56), 46 states have return successors, (209), 81 states have call predecessors, (209), 56 states have call successors, (209) [2023-11-06 20:30:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 801 transitions. [2023-11-06 20:30:59,042 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 801 transitions. Word has length 36 [2023-11-06 20:30:59,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:59,042 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 801 transitions. [2023-11-06 20:30:59,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:30:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 801 transitions. [2023-11-06 20:30:59,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-06 20:30:59,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:59,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:59,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 20:30:59,044 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting system_initializeErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:59,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash -95723772, now seen corresponding path program 1 times [2023-11-06 20:30:59,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:59,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963600029] [2023-11-06 20:30:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:59,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:59,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:59,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963600029] [2023-11-06 20:30:59,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963600029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:59,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:59,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:30:59,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690987364] [2023-11-06 20:30:59,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:59,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:59,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:59,172 INFO L87 Difference]: Start difference. First operand 559 states and 801 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:30:59,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:59,440 INFO L93 Difference]: Finished difference Result 557 states and 799 transitions. [2023-11-06 20:30:59,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:59,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-11-06 20:30:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:59,447 INFO L225 Difference]: With dead ends: 557 [2023-11-06 20:30:59,448 INFO L226 Difference]: Without dead ends: 557 [2023-11-06 20:30:59,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:59,449 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 5 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:59,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 473 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:30:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-11-06 20:30:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2023-11-06 20:30:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 349 states have (on average 1.5300859598853869) internal successors, (534), 445 states have internal predecessors, (534), 56 states have call successors, (56), 30 states have call predecessors, (56), 46 states have return successors, (209), 81 states have call predecessors, (209), 56 states have call successors, (209) [2023-11-06 20:30:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 799 transitions. [2023-11-06 20:30:59,500 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 799 transitions. Word has length 36 [2023-11-06 20:30:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:59,500 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 799 transitions. [2023-11-06 20:30:59,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:30:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 799 transitions. [2023-11-06 20:30:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-06 20:30:59,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:59,502 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:59,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 20:30:59,502 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ASNullErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:30:59,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:59,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1285346563, now seen corresponding path program 1 times [2023-11-06 20:30:59,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:59,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271270779] [2023-11-06 20:30:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:59,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:59,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271270779] [2023-11-06 20:30:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271270779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:59,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:30:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871056221] [2023-11-06 20:30:59,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:59,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:30:59,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:59,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:30:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:30:59,759 INFO L87 Difference]: Start difference. First operand 557 states and 799 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:31:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:00,428 INFO L93 Difference]: Finished difference Result 585 states and 852 transitions. [2023-11-06 20:31:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 20:31:00,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2023-11-06 20:31:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:00,437 INFO L225 Difference]: With dead ends: 585 [2023-11-06 20:31:00,437 INFO L226 Difference]: Without dead ends: 585 [2023-11-06 20:31:00,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:31:00,438 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 45 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:00,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1149 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 20:31:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-06 20:31:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 577. [2023-11-06 20:31:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 365 states have (on average 1.526027397260274) internal successors, (557), 462 states have internal predecessors, (557), 57 states have call successors, (57), 32 states have call predecessors, (57), 49 states have return successors, (214), 82 states have call predecessors, (214), 57 states have call successors, (214) [2023-11-06 20:31:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 828 transitions. [2023-11-06 20:31:00,475 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 828 transitions. Word has length 44 [2023-11-06 20:31:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:00,475 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 828 transitions. [2023-11-06 20:31:00,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:31:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 828 transitions. [2023-11-06 20:31:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-06 20:31:00,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:00,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:00,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 20:31:00,476 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ASNullErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:31:00,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:00,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1285346564, now seen corresponding path program 1 times [2023-11-06 20:31:00,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:00,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344573961] [2023-11-06 20:31:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:00,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:00,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:00,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344573961] [2023-11-06 20:31:00,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344573961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:00,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:00,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:31:00,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805059198] [2023-11-06 20:31:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:00,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:31:00,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:31:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:31:00,804 INFO L87 Difference]: Start difference. First operand 577 states and 828 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:31:01,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:01,498 INFO L93 Difference]: Finished difference Result 584 states and 851 transitions. [2023-11-06 20:31:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:31:01,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2023-11-06 20:31:01,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:01,504 INFO L225 Difference]: With dead ends: 584 [2023-11-06 20:31:01,504 INFO L226 Difference]: Without dead ends: 584 [2023-11-06 20:31:01,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:31:01,505 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 42 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:01,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1201 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 20:31:01,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-06 20:31:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 577. [2023-11-06 20:31:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 365 states have (on average 1.5232876712328767) internal successors, (556), 462 states have internal predecessors, (556), 57 states have call successors, (57), 32 states have call predecessors, (57), 49 states have return successors, (214), 82 states have call predecessors, (214), 57 states have call successors, (214) [2023-11-06 20:31:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 827 transitions. [2023-11-06 20:31:01,537 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 827 transitions. Word has length 44 [2023-11-06 20:31:01,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:01,537 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 827 transitions. [2023-11-06 20:31:01,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:31:01,538 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 827 transitions. [2023-11-06 20:31:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 20:31:01,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:01,538 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:01,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-06 20:31:01,539 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-06 20:31:01,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:01,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1179738990, now seen corresponding path program 1 times [2023-11-06 20:31:01,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:01,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591702670] [2023-11-06 20:31:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:01,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:01,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:01,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591702670] [2023-11-06 20:31:01,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591702670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:01,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:01,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:31:01,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670924010] [2023-11-06 20:31:01,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:01,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:31:01,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:31:01,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:31:01,752 INFO L87 Difference]: Start difference. First operand 577 states and 827 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)