./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 cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/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_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:15:26,844 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:15:26,959 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:15:26,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:15:26,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:15:27,010 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:15:27,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:15:27,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:15:27,013 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:15:27,018 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:15:27,032 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:15:27,034 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:15:27,034 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:15:27,036 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:15:27,037 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:15:27,037 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:15:27,038 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:15:27,038 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:15:27,038 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:15:27,039 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:15:27,040 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:15:27,040 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:15:27,041 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:15:27,041 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:15:27,042 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:15:27,043 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:15:27,043 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:15:27,044 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:15:27,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:15:27,045 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:15:27,046 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:15:27,047 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:15:27,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:15:27,047 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:15:27,048 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:15:27,048 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:15:27,048 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:15:27,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:15:27,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:15:27,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:15:27,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:15:27,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:15:27,052 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:15:27,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:15:27,053 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:15:27,053 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:15:27,053 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_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab [2023-11-12 00:15:27,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:15:27,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:15:27,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:15:27,427 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:15:27,428 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:15:27,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2023-11-12 00:15:30,447 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:15:30,789 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:15:30,789 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2023-11-12 00:15:30,809 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/data/ad7715847/f7d9e003672e435da8c983183df2f719/FLAG5ec0f1df5 [2023-11-12 00:15:30,830 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/data/ad7715847/f7d9e003672e435da8c983183df2f719 [2023-11-12 00:15:30,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:15:30,837 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:15:30,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:15:30,839 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:15:30,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:15:30,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:15:30" (1/1) ... [2023-11-12 00:15:30,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18919fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:30, skipping insertion in model container [2023-11-12 00:15:30,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:15:30" (1/1) ... [2023-11-12 00:15:30,910 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:15:31,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:15:31,386 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:15:31,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:15:31,491 WARN L672 CHandler]: The function strncpy is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:15:31,499 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:15:31,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31 WrapperNode [2023-11-12 00:15:31,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:15:31,501 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:15:31,501 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:15:31,502 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:15:31,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,530 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,606 INFO L138 Inliner]: procedures = 184, calls = 150, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 229 [2023-11-12 00:15:31,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:15:31,608 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:15:31,608 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:15:31,608 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:15:31,618 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,653 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,654 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,719 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,725 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:15:31,726 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:15:31,726 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:15:31,726 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:15:31,728 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (1/1) ... [2023-11-12 00:15:31,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:15:31,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:31,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:15:31,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:15:31,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:15:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-12 00:15:31,810 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-12 00:15:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure event_precess [2023-11-12 00:15:31,811 INFO L138 BoogieDeclarations]: Found implementation of procedure event_precess [2023-11-12 00:15:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:15:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:15:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure ASNull [2023-11-12 00:15:31,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ASNull [2023-11-12 00:15:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:15:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:15:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:15:31,813 INFO L130 BoogieDeclarations]: Found specification of procedure ASStart [2023-11-12 00:15:31,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStart [2023-11-12 00:15:31,813 INFO L130 BoogieDeclarations]: Found specification of procedure status_update [2023-11-12 00:15:31,814 INFO L138 BoogieDeclarations]: Found implementation of procedure status_update [2023-11-12 00:15:31,814 INFO L130 BoogieDeclarations]: Found specification of procedure message_send [2023-11-12 00:15:31,814 INFO L138 BoogieDeclarations]: Found implementation of procedure message_send [2023-11-12 00:15:31,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:15:31,815 INFO L130 BoogieDeclarations]: Found specification of procedure ASIdle [2023-11-12 00:15:31,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ASIdle [2023-11-12 00:15:31,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:15:31,815 INFO L130 BoogieDeclarations]: Found specification of procedure system_initialize [2023-11-12 00:15:31,816 INFO L138 BoogieDeclarations]: Found implementation of procedure system_initialize [2023-11-12 00:15:31,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:15:31,816 INFO L130 BoogieDeclarations]: Found specification of procedure ASStop [2023-11-12 00:15:31,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStop [2023-11-12 00:15:31,817 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2023-11-12 00:15:31,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:15:31,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:15:32,003 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:15:32,005 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:15:33,098 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:15:33,196 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:15:33,196 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:15:33,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:15:33 BoogieIcfgContainer [2023-11-12 00:15:33,200 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:15:33,203 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:15:33,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:15:33,206 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:15:33,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:15:30" (1/3) ... [2023-11-12 00:15:33,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee4b4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:15:33, skipping insertion in model container [2023-11-12 00:15:33,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:31" (2/3) ... [2023-11-12 00:15:33,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee4b4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:15:33, skipping insertion in model container [2023-11-12 00:15:33,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:15:33" (3/3) ... [2023-11-12 00:15:33,209 INFO L112 eAbstractionObserver]: Analyzing ICFG system-with-recursion.i [2023-11-12 00:15:33,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:15:33,231 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 162 error locations. [2023-11-12 00:15:33,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:15:33,295 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;@45ab58c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:15:33,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 162 error locations. [2023-11-12 00:15:33,301 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) [2023-11-12 00:15:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:15:33,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:33,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:15:33,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:33,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash 589464126, now seen corresponding path program 1 times [2023-11-12 00:15:33,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:33,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830596750] [2023-11-12 00:15:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:33,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:33,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:33,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830596750] [2023-11-12 00:15:33,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830596750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:33,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:33,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:15:33,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287468490] [2023-11-12 00:15:33,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:33,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:33,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:33,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:33,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:33,750 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) [2023-11-12 00:15:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:34,325 INFO L93 Difference]: Finished difference Result 382 states and 443 transitions. [2023-11-12 00:15:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:34,328 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 [2023-11-12 00:15:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:34,354 INFO L225 Difference]: With dead ends: 382 [2023-11-12 00:15:34,354 INFO L226 Difference]: Without dead ends: 381 [2023-11-12 00:15:34,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:34,363 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 356 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:34,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 235 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:15:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-12 00:15:34,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 352. [2023-11-12 00:15:34,463 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) [2023-11-12 00:15:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 409 transitions. [2023-11-12 00:15:34,473 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 409 transitions. Word has length 5 [2023-11-12 00:15:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:34,474 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 409 transitions. [2023-11-12 00:15:34,474 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) [2023-11-12 00:15:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 409 transitions. [2023-11-12 00:15:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:15:34,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:34,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:15:34,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:15:34,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:34,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:34,478 INFO L85 PathProgramCache]: Analyzing trace with hash 589464127, now seen corresponding path program 1 times [2023-11-12 00:15:34,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:34,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118212263] [2023-11-12 00:15:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:34,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:34,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:34,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118212263] [2023-11-12 00:15:34,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118212263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:34,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:34,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:15:34,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363954363] [2023-11-12 00:15:34,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:34,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:15:34,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:34,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:15:34,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:15:34,714 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) [2023-11-12 00:15:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:35,350 INFO L93 Difference]: Finished difference Result 433 states and 517 transitions. [2023-11-12 00:15:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:15:35,351 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 [2023-11-12 00:15:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:35,355 INFO L225 Difference]: With dead ends: 433 [2023-11-12 00:15:35,355 INFO L226 Difference]: Without dead ends: 433 [2023-11-12 00:15:35,355 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 [2023-11-12 00:15:35,357 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 [2023-11-12 00:15:35,357 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] [2023-11-12 00:15:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-12 00:15:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 412. [2023-11-12 00:15:35,381 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) [2023-11-12 00:15:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 506 transitions. [2023-11-12 00:15:35,385 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 506 transitions. Word has length 5 [2023-11-12 00:15:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:35,385 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 506 transitions. [2023-11-12 00:15:35,385 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) [2023-11-12 00:15:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 506 transitions. [2023-11-12 00:15:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:15:35,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:35,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:35,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:15:35,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:35,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1395036813, now seen corresponding path program 1 times [2023-11-12 00:15:35,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:35,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10189485] [2023-11-12 00:15:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:35,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:35,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:35,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10189485] [2023-11-12 00:15:35,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10189485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:35,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:35,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:15:35,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757566207] [2023-11-12 00:15:35,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:35,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:15:35,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:35,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:15:35,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:15:35,577 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) [2023-11-12 00:15:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:36,090 INFO L93 Difference]: Finished difference Result 411 states and 505 transitions. [2023-11-12 00:15:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:15:36,091 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 [2023-11-12 00:15:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:36,095 INFO L225 Difference]: With dead ends: 411 [2023-11-12 00:15:36,095 INFO L226 Difference]: Without dead ends: 411 [2023-11-12 00:15:36,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:36,097 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 [2023-11-12 00:15:36,097 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] [2023-11-12 00:15:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-11-12 00:15:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2023-11-12 00:15:36,114 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) [2023-11-12 00:15:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 505 transitions. [2023-11-12 00:15:36,118 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 505 transitions. Word has length 8 [2023-11-12 00:15:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:36,119 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 505 transitions. [2023-11-12 00:15:36,119 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) [2023-11-12 00:15:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 505 transitions. [2023-11-12 00:15:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:15:36,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:36,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:36,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:15:36,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:36,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1395036812, now seen corresponding path program 1 times [2023-11-12 00:15:36,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:36,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24211540] [2023-11-12 00:15:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:36,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:36,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24211540] [2023-11-12 00:15:36,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24211540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:36,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:36,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:15:36,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991657330] [2023-11-12 00:15:36,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:36,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:15:36,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:15:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:15:36,349 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) [2023-11-12 00:15:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:36,927 INFO L93 Difference]: Finished difference Result 410 states and 504 transitions. [2023-11-12 00:15:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:15:36,928 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 [2023-11-12 00:15:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:36,934 INFO L225 Difference]: With dead ends: 410 [2023-11-12 00:15:36,935 INFO L226 Difference]: Without dead ends: 410 [2023-11-12 00:15:36,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:36,936 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 [2023-11-12 00:15:36,936 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] [2023-11-12 00:15:36,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-12 00:15:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2023-11-12 00:15:36,956 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) [2023-11-12 00:15:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 504 transitions. [2023-11-12 00:15:36,963 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 504 transitions. Word has length 8 [2023-11-12 00:15:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:36,964 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 504 transitions. [2023-11-12 00:15:36,964 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) [2023-11-12 00:15:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 504 transitions. [2023-11-12 00:15:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:15:36,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:36,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:36,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:15:36,966 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:36,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:36,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1515620074, now seen corresponding path program 1 times [2023-11-12 00:15:36,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:36,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740979425] [2023-11-12 00:15:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:36,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:37,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:37,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740979425] [2023-11-12 00:15:37,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740979425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:37,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:37,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:15:37,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17789631] [2023-11-12 00:15:37,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:37,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:37,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:37,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:37,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:37,072 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) [2023-11-12 00:15:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:37,345 INFO L93 Difference]: Finished difference Result 409 states and 503 transitions. [2023-11-12 00:15:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:37,346 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 [2023-11-12 00:15:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:37,350 INFO L225 Difference]: With dead ends: 409 [2023-11-12 00:15:37,351 INFO L226 Difference]: Without dead ends: 409 [2023-11-12 00:15:37,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:37,352 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:37,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 518 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:15:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-11-12 00:15:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2023-11-12 00:15:37,384 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) [2023-11-12 00:15:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 503 transitions. [2023-11-12 00:15:37,390 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 503 transitions. Word has length 12 [2023-11-12 00:15:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:37,391 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 503 transitions. [2023-11-12 00:15:37,391 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) [2023-11-12 00:15:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 503 transitions. [2023-11-12 00:15:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:15:37,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:37,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:37,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:15:37,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:37,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:37,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1515620073, now seen corresponding path program 1 times [2023-11-12 00:15:37,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:37,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828710883] [2023-11-12 00:15:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:37,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:37,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:37,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828710883] [2023-11-12 00:15:37,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828710883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:37,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:37,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:15:37,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838894044] [2023-11-12 00:15:37,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:37,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:37,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:37,548 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) [2023-11-12 00:15:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:37,874 INFO L93 Difference]: Finished difference Result 408 states and 502 transitions. [2023-11-12 00:15:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:37,878 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 [2023-11-12 00:15:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:37,881 INFO L225 Difference]: With dead ends: 408 [2023-11-12 00:15:37,881 INFO L226 Difference]: Without dead ends: 408 [2023-11-12 00:15:37,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:37,882 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 [2023-11-12 00:15:37,883 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] [2023-11-12 00:15:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-12 00:15:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2023-11-12 00:15:37,904 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) [2023-11-12 00:15:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 502 transitions. [2023-11-12 00:15:37,910 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 502 transitions. Word has length 12 [2023-11-12 00:15:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:37,910 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 502 transitions. [2023-11-12 00:15:37,910 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) [2023-11-12 00:15:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 502 transitions. [2023-11-12 00:15:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:15:37,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:37,912 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] [2023-11-12 00:15:37,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:15:37,913 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ASNullErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:37,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:37,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1434793994, now seen corresponding path program 1 times [2023-11-12 00:15:37,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:37,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643014382] [2023-11-12 00:15:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:37,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:38,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:38,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643014382] [2023-11-12 00:15:38,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643014382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:38,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:38,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:15:38,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134975406] [2023-11-12 00:15:38,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:38,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:15:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:15:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:38,136 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) [2023-11-12 00:15:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:38,876 INFO L93 Difference]: Finished difference Result 438 states and 547 transitions. [2023-11-12 00:15:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:15:38,878 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 [2023-11-12 00:15:38,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:38,881 INFO L225 Difference]: With dead ends: 438 [2023-11-12 00:15:38,881 INFO L226 Difference]: Without dead ends: 438 [2023-11-12 00:15:38,882 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 [2023-11-12 00:15:38,882 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 44 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2023-11-12 00:15:38,883 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] [2023-11-12 00:15:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-12 00:15:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 427. [2023-11-12 00:15:38,897 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) [2023-11-12 00:15:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 529 transitions. [2023-11-12 00:15:38,901 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 529 transitions. Word has length 20 [2023-11-12 00:15:38,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:38,901 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 529 transitions. [2023-11-12 00:15:38,902 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) [2023-11-12 00:15:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 529 transitions. [2023-11-12 00:15:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:15:38,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:38,903 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] [2023-11-12 00:15:38,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:15:38,903 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ASNullErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:38,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1434793993, now seen corresponding path program 1 times [2023-11-12 00:15:38,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:38,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940076818] [2023-11-12 00:15:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:38,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:39,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:39,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940076818] [2023-11-12 00:15:39,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940076818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:39,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:39,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:15:39,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753891169] [2023-11-12 00:15:39,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:39,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:15:39,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:39,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:15:39,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:39,295 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) [2023-11-12 00:15:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:40,179 INFO L93 Difference]: Finished difference Result 437 states and 546 transitions. [2023-11-12 00:15:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:15:40,179 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 [2023-11-12 00:15:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:40,182 INFO L225 Difference]: With dead ends: 437 [2023-11-12 00:15:40,182 INFO L226 Difference]: Without dead ends: 437 [2023-11-12 00:15:40,183 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 [2023-11-12 00:15:40,183 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 [2023-11-12 00:15:40,184 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] [2023-11-12 00:15:40,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-11-12 00:15:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 427. [2023-11-12 00:15:40,197 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) [2023-11-12 00:15:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 528 transitions. [2023-11-12 00:15:40,200 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 528 transitions. Word has length 20 [2023-11-12 00:15:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:40,201 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 528 transitions. [2023-11-12 00:15:40,201 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) [2023-11-12 00:15:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 528 transitions. [2023-11-12 00:15:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:15:40,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:40,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:40,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:15:40,203 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:40,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:40,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1540239653, now seen corresponding path program 1 times [2023-11-12 00:15:40,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:40,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742440337] [2023-11-12 00:15:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:40,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:40,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:40,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742440337] [2023-11-12 00:15:40,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742440337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:40,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:40,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:15:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578644862] [2023-11-12 00:15:40,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:40,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:15:40,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:40,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:15:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:40,366 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) [2023-11-12 00:15:41,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:41,151 INFO L93 Difference]: Finished difference Result 523 states and 664 transitions. [2023-11-12 00:15:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:15:41,152 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 [2023-11-12 00:15:41,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:41,156 INFO L225 Difference]: With dead ends: 523 [2023-11-12 00:15:41,157 INFO L226 Difference]: Without dead ends: 523 [2023-11-12 00:15:41,157 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 [2023-11-12 00:15:41,158 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 [2023-11-12 00:15:41,158 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] [2023-11-12 00:15:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-11-12 00:15:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 459. [2023-11-12 00:15:41,176 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) [2023-11-12 00:15:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 583 transitions. [2023-11-12 00:15:41,181 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 583 transitions. Word has length 21 [2023-11-12 00:15:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:41,182 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 583 transitions. [2023-11-12 00:15:41,182 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) [2023-11-12 00:15:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 583 transitions. [2023-11-12 00:15:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:15:41,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:41,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:41,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:15:41,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:41,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1540239652, now seen corresponding path program 1 times [2023-11-12 00:15:41,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:41,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098720111] [2023-11-12 00:15:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:41,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:41,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:41,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098720111] [2023-11-12 00:15:41,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098720111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:41,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:41,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:15:41,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212542605] [2023-11-12 00:15:41,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:41,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:15:41,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:41,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:15:41,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:15:41,500 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) [2023-11-12 00:15:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:42,370 INFO L93 Difference]: Finished difference Result 442 states and 529 transitions. [2023-11-12 00:15:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:15:42,371 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 [2023-11-12 00:15:42,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:42,375 INFO L225 Difference]: With dead ends: 442 [2023-11-12 00:15:42,375 INFO L226 Difference]: Without dead ends: 442 [2023-11-12 00:15:42,375 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 [2023-11-12 00:15:42,376 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 426 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:42,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 715 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:15:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-11-12 00:15:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 392. [2023-11-12 00:15:42,392 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) [2023-11-12 00:15:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2023-11-12 00:15:42,396 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 21 [2023-11-12 00:15:42,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:42,397 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2023-11-12 00:15:42,397 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) [2023-11-12 00:15:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2023-11-12 00:15:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 00:15:42,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:42,399 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] [2023-11-12 00:15:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:15:42,399 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:42,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:42,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1632919712, now seen corresponding path program 1 times [2023-11-12 00:15:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:42,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581602453] [2023-11-12 00:15:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:42,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:42,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581602453] [2023-11-12 00:15:42,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581602453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:42,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:42,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:15:42,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151233849] [2023-11-12 00:15:42,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:42,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:15:42,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:15:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:15:42,515 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) [2023-11-12 00:15:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:42,718 INFO L93 Difference]: Finished difference Result 403 states and 481 transitions. [2023-11-12 00:15:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:15:42,719 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 [2023-11-12 00:15:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:42,722 INFO L225 Difference]: With dead ends: 403 [2023-11-12 00:15:42,722 INFO L226 Difference]: Without dead ends: 401 [2023-11-12 00:15:42,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:15:42,723 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:42,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 907 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:15:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-11-12 00:15:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 399. [2023-11-12 00:15:42,742 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) [2023-11-12 00:15:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 479 transitions. [2023-11-12 00:15:42,746 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 479 transitions. Word has length 30 [2023-11-12 00:15:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:42,746 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 479 transitions. [2023-11-12 00:15:42,747 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) [2023-11-12 00:15:42,747 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 479 transitions. [2023-11-12 00:15:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:15:42,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:42,748 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] [2023-11-12 00:15:42,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:15:42,749 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:42,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:42,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1863406002, now seen corresponding path program 1 times [2023-11-12 00:15:42,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:42,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440969295] [2023-11-12 00:15:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:42,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:43,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:43,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440969295] [2023-11-12 00:15:43,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440969295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:43,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:43,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:15:43,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275756508] [2023-11-12 00:15:43,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:43,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:15:43,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:43,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:15:43,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:15:43,087 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) [2023-11-12 00:15:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:44,097 INFO L93 Difference]: Finished difference Result 442 states and 562 transitions. [2023-11-12 00:15:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:15:44,098 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 [2023-11-12 00:15:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:44,105 INFO L225 Difference]: With dead ends: 442 [2023-11-12 00:15:44,106 INFO L226 Difference]: Without dead ends: 436 [2023-11-12 00:15:44,106 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 [2023-11-12 00:15:44,109 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 133 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:44,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1907 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:15:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-11-12 00:15:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 399. [2023-11-12 00:15:44,128 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) [2023-11-12 00:15:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 478 transitions. [2023-11-12 00:15:44,133 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 478 transitions. Word has length 29 [2023-11-12 00:15:44,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:44,133 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 478 transitions. [2023-11-12 00:15:44,134 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) [2023-11-12 00:15:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 478 transitions. [2023-11-12 00:15:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 00:15:44,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:44,135 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] [2023-11-12 00:15:44,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 00:15:44,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:44,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1640573506, now seen corresponding path program 1 times [2023-11-12 00:15:44,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:44,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561208859] [2023-11-12 00:15:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:44,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:44,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:44,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561208859] [2023-11-12 00:15:44,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561208859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:44,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:44,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:15:44,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68203409] [2023-11-12 00:15:44,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:44,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:15:44,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:44,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:15:44,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:15:44,453 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) [2023-11-12 00:15:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:45,638 INFO L93 Difference]: Finished difference Result 600 states and 818 transitions. [2023-11-12 00:15:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:15:45,639 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 [2023-11-12 00:15:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:45,643 INFO L225 Difference]: With dead ends: 600 [2023-11-12 00:15:45,643 INFO L226 Difference]: Without dead ends: 594 [2023-11-12 00:15:45,643 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 [2023-11-12 00:15:45,644 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 298 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:45,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1429 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:15:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2023-11-12 00:15:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 552. [2023-11-12 00:15:45,668 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) [2023-11-12 00:15:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 780 transitions. [2023-11-12 00:15:45,674 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 780 transitions. Word has length 32 [2023-11-12 00:15:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:45,674 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 780 transitions. [2023-11-12 00:15:45,675 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) [2023-11-12 00:15:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 780 transitions. [2023-11-12 00:15:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 00:15:45,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:45,676 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] [2023-11-12 00:15:45,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:15:45,677 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:45,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:45,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1069311814, now seen corresponding path program 1 times [2023-11-12 00:15:45,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:45,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9620178] [2023-11-12 00:15:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:46,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:46,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9620178] [2023-11-12 00:15:46,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9620178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:46,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:46,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:15:46,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165473399] [2023-11-12 00:15:46,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:46,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:15:46,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:46,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:15:46,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:15:46,130 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) [2023-11-12 00:15:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:47,006 INFO L93 Difference]: Finished difference Result 581 states and 842 transitions. [2023-11-12 00:15:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:15:47,007 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 [2023-11-12 00:15:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:47,018 INFO L225 Difference]: With dead ends: 581 [2023-11-12 00:15:47,018 INFO L226 Difference]: Without dead ends: 581 [2023-11-12 00:15:47,019 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 [2023-11-12 00:15:47,020 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 646 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:47,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 294 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:15:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2023-11-12 00:15:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 556. [2023-11-12 00:15:47,067 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) [2023-11-12 00:15:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 796 transitions. [2023-11-12 00:15:47,076 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 796 transitions. Word has length 33 [2023-11-12 00:15:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:47,077 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 796 transitions. [2023-11-12 00:15:47,077 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) [2023-11-12 00:15:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 796 transitions. [2023-11-12 00:15:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 00:15:47,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:47,081 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] [2023-11-12 00:15:47,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 00:15:47,084 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting system_initializeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:47,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1211072226, now seen corresponding path program 1 times [2023-11-12 00:15:47,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:47,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962550653] [2023-11-12 00:15:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:48,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:48,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962550653] [2023-11-12 00:15:48,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962550653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:48,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:48,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 00:15:48,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080405321] [2023-11-12 00:15:48,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:48,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:15:48,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:48,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:15:48,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:15:48,179 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) [2023-11-12 00:15:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:49,889 INFO L93 Difference]: Finished difference Result 608 states and 899 transitions. [2023-11-12 00:15:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:15:49,890 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 [2023-11-12 00:15:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:49,896 INFO L225 Difference]: With dead ends: 608 [2023-11-12 00:15:49,896 INFO L226 Difference]: Without dead ends: 608 [2023-11-12 00:15:49,899 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 [2023-11-12 00:15:49,899 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 338 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:49,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1502 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 00:15:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2023-11-12 00:15:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 561. [2023-11-12 00:15:49,935 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) [2023-11-12 00:15:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 804 transitions. [2023-11-12 00:15:49,941 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 804 transitions. Word has length 34 [2023-11-12 00:15:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:49,942 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 804 transitions. [2023-11-12 00:15:49,942 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) [2023-11-12 00:15:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 804 transitions. [2023-11-12 00:15:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 00:15:49,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:49,948 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] [2023-11-12 00:15:49,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 00:15:49,948 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting system_initializeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:49,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:49,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1211072227, now seen corresponding path program 1 times [2023-11-12 00:15:49,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:49,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073646170] [2023-11-12 00:15:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:49,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:51,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:51,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073646170] [2023-11-12 00:15:51,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073646170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:51,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:51,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-12 00:15:51,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773514769] [2023-11-12 00:15:51,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:51,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:15:51,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:51,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:15:51,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:15:51,489 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) [2023-11-12 00:15:53,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:53,260 INFO L93 Difference]: Finished difference Result 607 states and 898 transitions. [2023-11-12 00:15:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:15:53,261 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 [2023-11-12 00:15:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:53,267 INFO L225 Difference]: With dead ends: 607 [2023-11-12 00:15:53,267 INFO L226 Difference]: Without dead ends: 607 [2023-11-12 00:15:53,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:15:53,269 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 352 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:53,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1082 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 00:15:53,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2023-11-12 00:15:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 561. [2023-11-12 00:15:53,305 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) [2023-11-12 00:15:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 803 transitions. [2023-11-12 00:15:53,311 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 803 transitions. Word has length 34 [2023-11-12 00:15:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:53,311 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 803 transitions. [2023-11-12 00:15:53,312 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) [2023-11-12 00:15:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 803 transitions. [2023-11-12 00:15:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-12 00:15:53,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:53,313 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] [2023-11-12 00:15:53,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 00:15:53,313 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting system_initializeErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:53,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash -95723773, now seen corresponding path program 1 times [2023-11-12 00:15:53,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:53,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155718847] [2023-11-12 00:15:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:53,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:53,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:53,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155718847] [2023-11-12 00:15:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155718847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:53,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:53,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:15:53,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142155416] [2023-11-12 00:15:53,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:53,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:53,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:53,425 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) [2023-11-12 00:15:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:53,702 INFO L93 Difference]: Finished difference Result 559 states and 801 transitions. [2023-11-12 00:15:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:53,703 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 [2023-11-12 00:15:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:53,708 INFO L225 Difference]: With dead ends: 559 [2023-11-12 00:15:53,708 INFO L226 Difference]: Without dead ends: 559 [2023-11-12 00:15:53,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:53,709 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 [2023-11-12 00:15:53,710 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] [2023-11-12 00:15:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-11-12 00:15:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2023-11-12 00:15:53,739 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) [2023-11-12 00:15:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 801 transitions. [2023-11-12 00:15:53,745 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 801 transitions. Word has length 36 [2023-11-12 00:15:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:53,746 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 801 transitions. [2023-11-12 00:15:53,747 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) [2023-11-12 00:15:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 801 transitions. [2023-11-12 00:15:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-12 00:15:53,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:53,749 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] [2023-11-12 00:15:53,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 00:15:53,749 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting system_initializeErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:53,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:53,755 INFO L85 PathProgramCache]: Analyzing trace with hash -95723772, now seen corresponding path program 1 times [2023-11-12 00:15:53,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:53,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553427332] [2023-11-12 00:15:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:53,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:53,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553427332] [2023-11-12 00:15:53,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553427332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:53,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:53,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:15:53,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268568140] [2023-11-12 00:15:53,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:53,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:53,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:53,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:53,977 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) [2023-11-12 00:15:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:54,317 INFO L93 Difference]: Finished difference Result 557 states and 799 transitions. [2023-11-12 00:15:54,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:54,318 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 [2023-11-12 00:15:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:54,324 INFO L225 Difference]: With dead ends: 557 [2023-11-12 00:15:54,324 INFO L226 Difference]: Without dead ends: 557 [2023-11-12 00:15:54,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:54,325 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 5 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:54,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 473 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:15:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-11-12 00:15:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2023-11-12 00:15:54,357 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) [2023-11-12 00:15:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 799 transitions. [2023-11-12 00:15:54,375 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 799 transitions. Word has length 36 [2023-11-12 00:15:54,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:54,375 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 799 transitions. [2023-11-12 00:15:54,376 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) [2023-11-12 00:15:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 799 transitions. [2023-11-12 00:15:54,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 00:15:54,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:54,378 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] [2023-11-12 00:15:54,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 00:15:54,378 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ASNullErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:54,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:54,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1285346563, now seen corresponding path program 1 times [2023-11-12 00:15:54,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:54,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16342077] [2023-11-12 00:15:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:54,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:54,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:54,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16342077] [2023-11-12 00:15:54,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16342077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:54,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:54,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:15:54,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927348215] [2023-11-12 00:15:54,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:54,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:15:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:15:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:54,657 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) [2023-11-12 00:15:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:55,397 INFO L93 Difference]: Finished difference Result 585 states and 852 transitions. [2023-11-12 00:15:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:15:55,398 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 [2023-11-12 00:15:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:55,404 INFO L225 Difference]: With dead ends: 585 [2023-11-12 00:15:55,404 INFO L226 Difference]: Without dead ends: 585 [2023-11-12 00:15:55,405 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 [2023-11-12 00:15:55,405 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 45 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:55,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1149 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:15:55,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-12 00:15:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 577. [2023-11-12 00:15:55,438 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) [2023-11-12 00:15:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 828 transitions. [2023-11-12 00:15:55,442 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 828 transitions. Word has length 44 [2023-11-12 00:15:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:55,443 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 828 transitions. [2023-11-12 00:15:55,443 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) [2023-11-12 00:15:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 828 transitions. [2023-11-12 00:15:55,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 00:15:55,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:55,444 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] [2023-11-12 00:15:55,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-12 00:15:55,445 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ASNullErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:55,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:55,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1285346564, now seen corresponding path program 1 times [2023-11-12 00:15:55,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:55,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487547050] [2023-11-12 00:15:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:55,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:55,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487547050] [2023-11-12 00:15:55,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487547050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:55,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:55,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:15:55,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238023278] [2023-11-12 00:15:55,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:55,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:15:55,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:55,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:15:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:55,826 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) [2023-11-12 00:15:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:56,607 INFO L93 Difference]: Finished difference Result 584 states and 851 transitions. [2023-11-12 00:15:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:15:56,607 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 [2023-11-12 00:15:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:56,613 INFO L225 Difference]: With dead ends: 584 [2023-11-12 00:15:56,613 INFO L226 Difference]: Without dead ends: 584 [2023-11-12 00:15:56,613 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 [2023-11-12 00:15:56,615 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 42 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:56,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1201 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:15:56,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-12 00:15:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 577. [2023-11-12 00:15:56,649 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) [2023-11-12 00:15:56,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 827 transitions. [2023-11-12 00:15:56,653 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 827 transitions. Word has length 44 [2023-11-12 00:15:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:56,654 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 827 transitions. [2023-11-12 00:15:56,654 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) [2023-11-12 00:15:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 827 transitions. [2023-11-12 00:15:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 00:15:56,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:56,655 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] [2023-11-12 00:15:56,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-12 00:15:56,657 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:56,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1179738990, now seen corresponding path program 1 times [2023-11-12 00:15:56,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:56,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848991072] [2023-11-12 00:15:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:56,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:56,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:56,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848991072] [2023-11-12 00:15:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848991072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:56,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:56,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:15:56,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375482958] [2023-11-12 00:15:56,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:56,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:15:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:15:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:56,888 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) [2023-11-12 00:15:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:57,726 INFO L93 Difference]: Finished difference Result 651 states and 945 transitions. [2023-11-12 00:15:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:15:57,727 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 45 [2023-11-12 00:15:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:57,732 INFO L225 Difference]: With dead ends: 651 [2023-11-12 00:15:57,733 INFO L226 Difference]: Without dead ends: 651 [2023-11-12 00:15:57,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:15:57,734 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 162 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:57,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1066 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:15:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2023-11-12 00:15:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 585. [2023-11-12 00:15:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 371 states have (on average 1.522911051212938) internal successors, (565), 468 states have internal predecessors, (565), 58 states have call successors, (58), 33 states have call predecessors, (58), 50 states have return successors, (218), 83 states have call predecessors, (218), 58 states have call successors, (218) [2023-11-12 00:15:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 841 transitions. [2023-11-12 00:15:57,770 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 841 transitions. Word has length 45 [2023-11-12 00:15:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:57,771 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 841 transitions. [2023-11-12 00:15:57,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-12 00:15:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 841 transitions. [2023-11-12 00:15:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 00:15:57,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:57,772 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] [2023-11-12 00:15:57,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-12 00:15:57,773 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:57,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:57,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1179738991, now seen corresponding path program 1 times [2023-11-12 00:15:57,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:57,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614596955] [2023-11-12 00:15:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:57,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:58,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:58,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614596955] [2023-11-12 00:15:58,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614596955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:58,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:58,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:15:58,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621616399] [2023-11-12 00:15:58,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:15:58,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:58,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:15:58,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:58,152 INFO L87 Difference]: Start difference. First operand 585 states and 841 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) [2023-11-12 00:15:58,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:58,924 INFO L93 Difference]: Finished difference Result 591 states and 856 transitions. [2023-11-12 00:15:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:15:58,927 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 45 [2023-11-12 00:15:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:58,932 INFO L225 Difference]: With dead ends: 591 [2023-11-12 00:15:58,932 INFO L226 Difference]: Without dead ends: 591 [2023-11-12 00:15:58,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:15:58,935 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 39 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:58,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1180 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:15:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-11-12 00:15:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 585. [2023-11-12 00:15:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 371 states have (on average 1.5202156334231807) internal successors, (564), 468 states have internal predecessors, (564), 58 states have call successors, (58), 33 states have call predecessors, (58), 50 states have return successors, (218), 83 states have call predecessors, (218), 58 states have call successors, (218) [2023-11-12 00:15:58,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 840 transitions. [2023-11-12 00:15:58,964 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 840 transitions. Word has length 45 [2023-11-12 00:15:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:58,964 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 840 transitions. [2023-11-12 00:15:58,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-12 00:15:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 840 transitions. [2023-11-12 00:15:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 00:15:58,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:58,966 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, 1] [2023-11-12 00:15:58,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-12 00:15:58,966 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ASIdleErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:15:58,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:58,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2093585023, now seen corresponding path program 1 times [2023-11-12 00:15:58,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:58,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787756216] [2023-11-12 00:15:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:58,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:59,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:59,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787756216] [2023-11-12 00:15:59,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787756216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:59,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:59,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:15:59,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936263093] [2023-11-12 00:15:59,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:59,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:15:59,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:59,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:15:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:59,353 INFO L87 Difference]: Start difference. First operand 585 states and 840 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-12 00:16:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:16:00,118 INFO L93 Difference]: Finished difference Result 629 states and 926 transitions. [2023-11-12 00:16:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:16:00,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 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 46 [2023-11-12 00:16:00,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:16:00,124 INFO L225 Difference]: With dead ends: 629 [2023-11-12 00:16:00,124 INFO L226 Difference]: Without dead ends: 629 [2023-11-12 00:16:00,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:16:00,125 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 54 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:16:00,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1160 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:16:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-11-12 00:16:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 618. [2023-11-12 00:16:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 395 states have (on average 1.5113924050632912) internal successors, (597), 494 states have internal predecessors, (597), 62 states have call successors, (62), 35 states have call predecessors, (62), 55 states have return successors, (246), 88 states have call predecessors, (246), 62 states have call successors, (246) [2023-11-12 00:16:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 905 transitions. [2023-11-12 00:16:00,156 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 905 transitions. Word has length 46 [2023-11-12 00:16:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:16:00,156 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 905 transitions. [2023-11-12 00:16:00,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-12 00:16:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 905 transitions. [2023-11-12 00:16:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 00:16:00,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:16:00,157 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, 1] [2023-11-12 00:16:00,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-12 00:16:00,158 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ASIdleErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:16:00,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:16:00,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2093585024, now seen corresponding path program 1 times [2023-11-12 00:16:00,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:16:00,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651104271] [2023-11-12 00:16:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:16:00,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:16:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:16:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:16:00,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:16:00,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651104271] [2023-11-12 00:16:00,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651104271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:16:00,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:16:00,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:16:00,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282620490] [2023-11-12 00:16:00,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:16:00,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:16:00,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:16:00,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:16:00,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:16:00,359 INFO L87 Difference]: Start difference. First operand 618 states and 905 transitions. Second operand has 7 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-12 00:16:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:16:01,154 INFO L93 Difference]: Finished difference Result 708 states and 1076 transitions. [2023-11-12 00:16:01,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:16:01,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 46 [2023-11-12 00:16:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:16:01,162 INFO L225 Difference]: With dead ends: 708 [2023-11-12 00:16:01,162 INFO L226 Difference]: Without dead ends: 708 [2023-11-12 00:16:01,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:16:01,163 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 113 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:16:01,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1095 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:16:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-11-12 00:16:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 669. [2023-11-12 00:16:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 435 states have (on average 1.5011494252873563) internal successors, (653), 537 states have internal predecessors, (653), 64 states have call successors, (64), 38 states have call predecessors, (64), 64 states have return successors, (271), 93 states have call predecessors, (271), 64 states have call successors, (271) [2023-11-12 00:16:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 988 transitions. [2023-11-12 00:16:01,208 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 988 transitions. Word has length 46 [2023-11-12 00:16:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:16:01,209 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 988 transitions. [2023-11-12 00:16:01,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-12 00:16:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 988 transitions. [2023-11-12 00:16:01,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 00:16:01,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:16:01,211 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, 1, 1] [2023-11-12 00:16:01,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-12 00:16:01,211 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ASStopErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:16:01,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:16:01,212 INFO L85 PathProgramCache]: Analyzing trace with hash -487633301, now seen corresponding path program 1 times [2023-11-12 00:16:01,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:16:01,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515194481] [2023-11-12 00:16:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:16:01,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:16:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:16:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:16:01,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:16:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515194481] [2023-11-12 00:16:01,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515194481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:16:01,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:16:01,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:16:01,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011854987] [2023-11-12 00:16:01,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:16:01,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:16:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:16:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:16:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:16:01,435 INFO L87 Difference]: Start difference. First operand 669 states and 988 transitions. Second operand has 7 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-12 00:16:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:16:02,201 INFO L93 Difference]: Finished difference Result 730 states and 1117 transitions. [2023-11-12 00:16:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:16:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 47 [2023-11-12 00:16:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:16:02,208 INFO L225 Difference]: With dead ends: 730 [2023-11-12 00:16:02,208 INFO L226 Difference]: Without dead ends: 730 [2023-11-12 00:16:02,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:16:02,209 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 85 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:16:02,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1099 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:16:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2023-11-12 00:16:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 705. [2023-11-12 00:16:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 464 states have (on average 1.4978448275862069) internal successors, (695), 569 states have internal predecessors, (695), 65 states have call successors, (65), 40 states have call predecessors, (65), 70 states have return successors, (286), 95 states have call predecessors, (286), 65 states have call successors, (286) [2023-11-12 00:16:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1046 transitions. [2023-11-12 00:16:02,246 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1046 transitions. Word has length 47 [2023-11-12 00:16:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:16:02,246 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 1046 transitions. [2023-11-12 00:16:02,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-12 00:16:02,247 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1046 transitions. [2023-11-12 00:16:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 00:16:02,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:16:02,248 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, 1, 1] [2023-11-12 00:16:02,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-12 00:16:02,249 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ASStopErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:16:02,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:16:02,249 INFO L85 PathProgramCache]: Analyzing trace with hash -487633300, now seen corresponding path program 1 times [2023-11-12 00:16:02,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:16:02,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575597168] [2023-11-12 00:16:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:16:02,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:16:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:16:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:16:02,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:16:02,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575597168] [2023-11-12 00:16:02,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575597168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:16:02,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:16:02,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:16:02,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579316073] [2023-11-12 00:16:02,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:16:02,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:16:02,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:16:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:16:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:16:02,624 INFO L87 Difference]: Start difference. First operand 705 states and 1046 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-12 00:16:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:16:03,402 INFO L93 Difference]: Finished difference Result 763 states and 1162 transitions. [2023-11-12 00:16:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:16:03,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 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 47 [2023-11-12 00:16:03,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:16:03,409 INFO L225 Difference]: With dead ends: 763 [2023-11-12 00:16:03,409 INFO L226 Difference]: Without dead ends: 763 [2023-11-12 00:16:03,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:16:03,410 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 65 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:16:03,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1174 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:16:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2023-11-12 00:16:03,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 747. [2023-11-12 00:16:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 496 states have (on average 1.4899193548387097) internal successors, (739), 603 states have internal predecessors, (739), 69 states have call successors, (69), 42 states have call predecessors, (69), 76 states have return successors, (313), 101 states have call predecessors, (313), 69 states have call successors, (313) [2023-11-12 00:16:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1121 transitions. [2023-11-12 00:16:03,448 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1121 transitions. Word has length 47 [2023-11-12 00:16:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:16:03,449 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1121 transitions. [2023-11-12 00:16:03,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-12 00:16:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1121 transitions. [2023-11-12 00:16:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 00:16:03,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:16:03,450 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:16:03,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-12 00:16:03,451 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:16:03,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:16:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash 643745775, now seen corresponding path program 1 times [2023-11-12 00:16:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:16:03,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761229104] [2023-11-12 00:16:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:16:03,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:16:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:16:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:16:03,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:16:03,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761229104] [2023-11-12 00:16:03,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761229104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:16:03,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:16:03,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:16:03,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299731999] [2023-11-12 00:16:03,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:16:03,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:16:03,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:16:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:16:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:16:03,579 INFO L87 Difference]: Start difference. First operand 747 states and 1121 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:16:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:16:03,932 INFO L93 Difference]: Finished difference Result 745 states and 1119 transitions. [2023-11-12 00:16:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:16:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-11-12 00:16:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:16:03,939 INFO L225 Difference]: With dead ends: 745 [2023-11-12 00:16:03,939 INFO L226 Difference]: Without dead ends: 745 [2023-11-12 00:16:03,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:16:03,942 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 33 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:16:03,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 623 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:16:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-11-12 00:16:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 745. [2023-11-12 00:16:03,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 496 states have (on average 1.4858870967741935) internal successors, (737), 601 states have internal predecessors, (737), 69 states have call successors, (69), 42 states have call predecessors, (69), 76 states have return successors, (313), 101 states have call predecessors, (313), 69 states have call successors, (313) [2023-11-12 00:16:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1119 transitions. [2023-11-12 00:16:03,981 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1119 transitions. Word has length 51 [2023-11-12 00:16:03,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:16:03,982 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1119 transitions. [2023-11-12 00:16:03,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:16:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1119 transitions. [2023-11-12 00:16:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 00:16:03,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:16:03,983 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:16:03,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-12 00:16:03,984 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ASStartErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:16:03,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:16:03,984 INFO L85 PathProgramCache]: Analyzing trace with hash 643745776, now seen corresponding path program 1 times [2023-11-12 00:16:03,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:16:03,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107600540] [2023-11-12 00:16:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:16:03,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:16:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:16:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:16:05,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:16:05,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107600540] [2023-11-12 00:16:05,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107600540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:16:05,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768508300] [2023-11-12 00:16:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:16:05,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:16:05,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:16:05,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:16:05,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:16:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:16:05,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-12 00:16:05,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:16:05,980 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 00:16:05,981 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 00:16:06,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-12 00:16:06,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-12 00:16:06,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 00:16:06,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2023-11-12 00:16:06,298 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-12 00:16:06,353 INFO L322 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-12 00:16:06,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 72 [2023-11-12 00:16:06,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2023-11-12 00:16:06,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2023-11-12 00:16:06,403 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-12 00:16:06,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2023-11-12 00:16:06,431 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-12 00:16:06,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2023-11-12 00:16:06,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-12 00:16:06,477 INFO L322 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2023-11-12 00:16:06,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-11-12 00:16:06,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 32 [2023-11-12 00:16:06,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-12 00:16:06,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 00:16:06,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-12 00:16:06,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2023-11-12 00:16:06,837 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-12 00:16:06,863 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2023-11-12 00:16:06,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-12 00:16:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:16:06,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:16:06,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768508300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:16:06,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:16:06,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 25 [2023-11-12 00:16:06,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568709377] [2023-11-12 00:16:06,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:16:06,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 00:16:06,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:16:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 00:16:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-11-12 00:16:06,925 INFO L87 Difference]: Start difference. First operand 745 states and 1119 transitions. Second operand has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:16:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:16:10,727 INFO L93 Difference]: Finished difference Result 1335 states and 2104 transitions. [2023-11-12 00:16:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 00:16:10,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2023-11-12 00:16:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:16:10,746 INFO L225 Difference]: With dead ends: 1335 [2023-11-12 00:16:10,746 INFO L226 Difference]: Without dead ends: 1333 [2023-11-12 00:16:10,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 00:16:10,748 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 600 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 2719 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:16:10,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1907 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2719 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-12 00:16:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2023-11-12 00:16:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1131. [2023-11-12 00:16:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 802 states have (on average 1.527431421446384) internal successors, (1225), 912 states have internal predecessors, (1225), 107 states have call successors, (107), 66 states have call predecessors, (107), 118 states have return successors, (549), 152 states have call predecessors, (549), 107 states have call successors, (549) [2023-11-12 00:16:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1881 transitions. [2023-11-12 00:16:10,831 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1881 transitions. Word has length 51 [2023-11-12 00:16:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:16:10,832 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1881 transitions. [2023-11-12 00:16:10,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:16:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1881 transitions. [2023-11-12 00:16:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 00:16:10,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:16:10,837 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:16:10,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:16:11,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda3106f-da27-49c9-be85-d13da7a2c488/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-12 00:16:11,045 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ASStartErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-12 00:16:11,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:16:11,046 INFO L85 PathProgramCache]: Analyzing trace with hash 724835472, now seen corresponding path program 1 times [2023-11-12 00:16:11,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:16:11,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807202326] [2023-11-12 00:16:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:16:11,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:16:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat