./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 0e0057cc 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_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/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_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91 --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 0.2.4-dev-0e0057c [2023-11-24 23:56:33,422 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:56:33,505 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-24 23:56:33,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:56:33,511 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:56:33,535 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:56:33,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:56:33,536 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:56:33,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:56:33,538 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:56:33,538 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:56:33,539 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:56:33,540 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:56:33,540 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:56:33,541 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:56:33,541 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:56:33,542 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:56:33,543 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:56:33,543 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:56:33,544 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:56:33,544 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:56:33,550 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:56:33,554 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 23:56:33,555 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 23:56:33,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:56:33,556 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:56:33,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:56:33,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:56:33,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:56:33,557 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 23:56:33,558 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 23:56:33,559 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 23:56:33,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:56:33,560 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 23:56:33,561 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:56:33,561 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:56:33,561 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:56:33,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:56:33,562 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:56:33,562 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:56:33,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:33,563 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:56:33,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:56:33,564 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:56:33,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:56:33,565 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:56:33,565 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:56:33,565 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:56:33,565 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_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab [2023-11-24 23:56:33,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:56:33,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:56:33,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:56:33,982 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:56:33,983 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:56:33,984 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2023-11-24 23:56:37,190 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:56:37,547 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:56:37,554 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2023-11-24 23:56:37,574 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/data/53ce42f9c/17adffd1a41f4644a7c096dd462b452a/FLAGf07d7a765 [2023-11-24 23:56:37,591 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/data/53ce42f9c/17adffd1a41f4644a7c096dd462b452a [2023-11-24 23:56:37,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:56:37,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:56:37,597 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:37,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:56:37,612 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:56:37,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:37" (1/1) ... [2023-11-24 23:56:37,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f8081d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:37, skipping insertion in model container [2023-11-24 23:56:37,618 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:37" (1/1) ... [2023-11-24 23:56:37,711 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:56:38,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:38,476 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:56:38,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:38,586 WARN L675 CHandler]: The function strncpy is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:56:38,594 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:56:38,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38 WrapperNode [2023-11-24 23:56:38,595 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:38,596 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:38,596 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:56:38,597 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:56:38,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,635 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,680 INFO L138 Inliner]: procedures = 184, calls = 150, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 234 [2023-11-24 23:56:38,681 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:38,682 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:56:38,682 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:56:38,682 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:56:38,700 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,716 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,716 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,772 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,800 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:56:38,806 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:56:38,806 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:56:38,806 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:56:38,807 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (1/1) ... [2023-11-24 23:56:38,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:38,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:38,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:56:38,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:56:38,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:56:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-24 23:56:38,886 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-24 23:56:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure event_precess [2023-11-24 23:56:38,886 INFO L138 BoogieDeclarations]: Found implementation of procedure event_precess [2023-11-24 23:56:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:56:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:56:38,887 INFO L130 BoogieDeclarations]: Found specification of procedure ASNull [2023-11-24 23:56:38,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ASNull [2023-11-24 23:56:38,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:56:38,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:56:38,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:56:38,887 INFO L130 BoogieDeclarations]: Found specification of procedure ASStart [2023-11-24 23:56:38,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStart [2023-11-24 23:56:38,888 INFO L130 BoogieDeclarations]: Found specification of procedure status_update [2023-11-24 23:56:38,888 INFO L138 BoogieDeclarations]: Found implementation of procedure status_update [2023-11-24 23:56:38,888 INFO L130 BoogieDeclarations]: Found specification of procedure message_send [2023-11-24 23:56:38,889 INFO L138 BoogieDeclarations]: Found implementation of procedure message_send [2023-11-24 23:56:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:56:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure ASIdle [2023-11-24 23:56:38,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ASIdle [2023-11-24 23:56:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:56:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure system_initialize [2023-11-24 23:56:38,890 INFO L138 BoogieDeclarations]: Found implementation of procedure system_initialize [2023-11-24 23:56:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:56:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure ASStop [2023-11-24 23:56:38,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStop [2023-11-24 23:56:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2023-11-24 23:56:38,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:56:38,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:56:39,093 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:56:39,096 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:56:40,170 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:56:40,257 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:56:40,257 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 23:56:40,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:40 BoogieIcfgContainer [2023-11-24 23:56:40,260 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:56:40,262 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:56:40,262 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:56:40,266 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:56:40,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:56:37" (1/3) ... [2023-11-24 23:56:40,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3f890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:40, skipping insertion in model container [2023-11-24 23:56:40,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:38" (2/3) ... [2023-11-24 23:56:40,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3f890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:40, skipping insertion in model container [2023-11-24 23:56:40,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:40" (3/3) ... [2023-11-24 23:56:40,269 INFO L112 eAbstractionObserver]: Analyzing ICFG system-with-recursion.i [2023-11-24 23:56:40,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:56:40,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 162 error locations. [2023-11-24 23:56:40,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:56:40,380 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;@3548695, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:56:40,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 162 error locations. [2023-11-24 23:56:40,387 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) [2023-11-24 23:56:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:56:40,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:40,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:56:40,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:40,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:40,405 INFO L85 PathProgramCache]: Analyzing trace with hash 622806085, now seen corresponding path program 1 times [2023-11-24 23:56:40,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:40,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226486779] [2023-11-24 23:56:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:40,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226486779] [2023-11-24 23:56:40,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226486779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:40,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:40,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:56:40,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591122962] [2023-11-24 23:56:40,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:40,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:40,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:40,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:56:40,835 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) [2023-11-24 23:56:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:41,524 INFO L93 Difference]: Finished difference Result 382 states and 443 transitions. [2023-11-24 23:56:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:41,527 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 [2023-11-24 23:56:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:41,543 INFO L225 Difference]: With dead ends: 382 [2023-11-24 23:56:41,544 INFO L226 Difference]: Without dead ends: 381 [2023-11-24 23:56:41,545 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 [2023-11-24 23:56:41,549 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 [2023-11-24 23:56:41,550 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] [2023-11-24 23:56:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-24 23:56:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 352. [2023-11-24 23:56:41,618 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) [2023-11-24 23:56:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 409 transitions. [2023-11-24 23:56:41,623 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 409 transitions. Word has length 5 [2023-11-24 23:56:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:41,624 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 409 transitions. [2023-11-24 23:56:41,624 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) [2023-11-24 23:56:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 409 transitions. [2023-11-24 23:56:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:56:41,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:41,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:56:41,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:56:41,626 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:41,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:41,626 INFO L85 PathProgramCache]: Analyzing trace with hash 622806086, now seen corresponding path program 1 times [2023-11-24 23:56:41,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:41,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81856591] [2023-11-24 23:56:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:41,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:41,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:41,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81856591] [2023-11-24 23:56:41,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81856591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:41,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:41,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:56:41,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335964232] [2023-11-24 23:56:41,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:41,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:41,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:41,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:41,920 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) [2023-11-24 23:56:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:42,588 INFO L93 Difference]: Finished difference Result 433 states and 517 transitions. [2023-11-24 23:56:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:56:42,592 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 [2023-11-24 23:56:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:42,596 INFO L225 Difference]: With dead ends: 433 [2023-11-24 23:56:42,596 INFO L226 Difference]: Without dead ends: 433 [2023-11-24 23:56:42,596 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 [2023-11-24 23:56:42,598 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 114 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:42,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 640 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:56:42,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-24 23:56:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 412. [2023-11-24 23:56:42,626 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) [2023-11-24 23:56:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 506 transitions. [2023-11-24 23:56:42,630 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 506 transitions. Word has length 5 [2023-11-24 23:56:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:42,631 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 506 transitions. [2023-11-24 23:56:42,631 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) [2023-11-24 23:56:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 506 transitions. [2023-11-24 23:56:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:56:42,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:42,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:42,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:56:42,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:42,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:42,633 INFO L85 PathProgramCache]: Analyzing trace with hash -242179634, now seen corresponding path program 1 times [2023-11-24 23:56:42,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:42,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347095179] [2023-11-24 23:56:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:42,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:42,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:42,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347095179] [2023-11-24 23:56:42,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347095179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:42,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:42,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:42,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081385687] [2023-11-24 23:56:42,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:42,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:56:42,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:56:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:42,836 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) [2023-11-24 23:56:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:43,406 INFO L93 Difference]: Finished difference Result 411 states and 505 transitions. [2023-11-24 23:56:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:56:43,408 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 [2023-11-24 23:56:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:43,412 INFO L225 Difference]: With dead ends: 411 [2023-11-24 23:56:43,412 INFO L226 Difference]: Without dead ends: 411 [2023-11-24 23:56:43,413 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 [2023-11-24 23:56:43,414 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 10 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:43,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 897 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:56:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-11-24 23:56:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2023-11-24 23:56:43,437 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) [2023-11-24 23:56:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 505 transitions. [2023-11-24 23:56:43,442 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 505 transitions. Word has length 8 [2023-11-24 23:56:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:43,442 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 505 transitions. [2023-11-24 23:56:43,443 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) [2023-11-24 23:56:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 505 transitions. [2023-11-24 23:56:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:56:43,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:43,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:43,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:56:43,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:43,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:43,445 INFO L85 PathProgramCache]: Analyzing trace with hash -242179633, now seen corresponding path program 1 times [2023-11-24 23:56:43,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:43,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900579157] [2023-11-24 23:56:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:43,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:43,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:43,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900579157] [2023-11-24 23:56:43,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900579157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:43,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:43,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:43,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526417139] [2023-11-24 23:56:43,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:43,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:56:43,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:56:43,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:43,867 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) [2023-11-24 23:56:44,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:44,483 INFO L93 Difference]: Finished difference Result 410 states and 504 transitions. [2023-11-24 23:56:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:56:44,484 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 [2023-11-24 23:56:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:44,491 INFO L225 Difference]: With dead ends: 410 [2023-11-24 23:56:44,493 INFO L226 Difference]: Without dead ends: 410 [2023-11-24 23:56:44,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:56:44,495 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 7 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:44,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 875 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:56:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-24 23:56:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2023-11-24 23:56:44,520 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) [2023-11-24 23:56:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 504 transitions. [2023-11-24 23:56:44,528 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 504 transitions. Word has length 8 [2023-11-24 23:56:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:44,528 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 504 transitions. [2023-11-24 23:56:44,528 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) [2023-11-24 23:56:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 504 transitions. [2023-11-24 23:56:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:56:44,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:44,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:44,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:56:44,530 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:44,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:44,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1719837565, now seen corresponding path program 1 times [2023-11-24 23:56:44,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:44,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680110128] [2023-11-24 23:56:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:44,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:44,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:44,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680110128] [2023-11-24 23:56:44,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680110128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:44,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:44,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:56:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982980019] [2023-11-24 23:56:44,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:44,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:44,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:56:44,639 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) [2023-11-24 23:56:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:44,895 INFO L93 Difference]: Finished difference Result 409 states and 503 transitions. [2023-11-24 23:56:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:44,896 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 [2023-11-24 23:56:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:44,899 INFO L225 Difference]: With dead ends: 409 [2023-11-24 23:56:44,900 INFO L226 Difference]: Without dead ends: 409 [2023-11-24 23:56:44,900 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 [2023-11-24 23:56:44,901 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 2 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:44,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 516 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:56:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-11-24 23:56:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2023-11-24 23:56:44,916 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) [2023-11-24 23:56:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 503 transitions. [2023-11-24 23:56:44,921 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 503 transitions. Word has length 12 [2023-11-24 23:56:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:44,921 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 503 transitions. [2023-11-24 23:56:44,921 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) [2023-11-24 23:56:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 503 transitions. [2023-11-24 23:56:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:56:44,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:44,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:44,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:56:44,938 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:44,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:44,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1719837564, now seen corresponding path program 1 times [2023-11-24 23:56:44,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:44,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040967741] [2023-11-24 23:56:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:44,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:45,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:45,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040967741] [2023-11-24 23:56:45,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040967741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:45,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:45,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:56:45,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792386281] [2023-11-24 23:56:45,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:45,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:45,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:56:45,060 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) [2023-11-24 23:56:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:45,353 INFO L93 Difference]: Finished difference Result 408 states and 502 transitions. [2023-11-24 23:56:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:45,357 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 [2023-11-24 23:56:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:45,360 INFO L225 Difference]: With dead ends: 408 [2023-11-24 23:56:45,360 INFO L226 Difference]: Without dead ends: 408 [2023-11-24 23:56:45,360 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 [2023-11-24 23:56:45,361 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 1 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:45,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 502 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:56:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-24 23:56:45,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2023-11-24 23:56:45,386 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) [2023-11-24 23:56:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 502 transitions. [2023-11-24 23:56:45,391 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 502 transitions. Word has length 12 [2023-11-24 23:56:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:45,392 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 502 transitions. [2023-11-24 23:56:45,392 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) [2023-11-24 23:56:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 502 transitions. [2023-11-24 23:56:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:56:45,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:45,394 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] [2023-11-24 23:56:45,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:56:45,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ASNullErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:45,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:45,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1077945920, now seen corresponding path program 1 times [2023-11-24 23:56:45,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:45,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928482935] [2023-11-24 23:56:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:45,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:45,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:45,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928482935] [2023-11-24 23:56:45,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928482935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:45,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:45,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:56:45,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107388607] [2023-11-24 23:56:45,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:45,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:56:45,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:56:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:56:45,607 INFO L87 Difference]: Start difference. First operand 408 states and 502 transitions. Second operand has 7 states, 5 states have (on average 3.2) 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) [2023-11-24 23:56:46,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:46,396 INFO L93 Difference]: Finished difference Result 438 states and 547 transitions. [2023-11-24 23:56:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:56:46,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) 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 [2023-11-24 23:56:46,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:46,400 INFO L225 Difference]: With dead ends: 438 [2023-11-24 23:56:46,401 INFO L226 Difference]: Without dead ends: 438 [2023-11-24 23:56:46,401 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 [2023-11-24 23:56:46,402 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 44 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:46,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1242 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:56:46,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-24 23:56:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 427. [2023-11-24 23:56:46,419 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) [2023-11-24 23:56:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 529 transitions. [2023-11-24 23:56:46,423 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 529 transitions. Word has length 20 [2023-11-24 23:56:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:46,424 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 529 transitions. [2023-11-24 23:56:46,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) 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) [2023-11-24 23:56:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 529 transitions. [2023-11-24 23:56:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:56:46,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:46,425 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] [2023-11-24 23:56:46,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:56:46,426 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ASNullErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:46,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1077945919, now seen corresponding path program 1 times [2023-11-24 23:56:46,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:46,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919756999] [2023-11-24 23:56:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:46,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:46,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919756999] [2023-11-24 23:56:46,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919756999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:46,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:46,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:56:46,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490090595] [2023-11-24 23:56:46,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:46,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:56:46,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:46,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:56:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:56:46,747 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) [2023-11-24 23:56:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:47,611 INFO L93 Difference]: Finished difference Result 437 states and 546 transitions. [2023-11-24 23:56:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:56:47,612 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 [2023-11-24 23:56:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:47,616 INFO L225 Difference]: With dead ends: 437 [2023-11-24 23:56:47,616 INFO L226 Difference]: Without dead ends: 437 [2023-11-24 23:56:47,617 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 [2023-11-24 23:56:47,619 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 38 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:47,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1182 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:56:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-11-24 23:56:47,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 427. [2023-11-24 23:56:47,640 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) [2023-11-24 23:56:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 528 transitions. [2023-11-24 23:56:47,647 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 528 transitions. Word has length 20 [2023-11-24 23:56:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:47,649 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 528 transitions. [2023-11-24 23:56:47,650 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) [2023-11-24 23:56:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 528 transitions. [2023-11-24 23:56:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 23:56:47,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:47,653 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] [2023-11-24 23:56:47,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:56:47,653 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:47,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:47,654 INFO L85 PathProgramCache]: Analyzing trace with hash 932056405, now seen corresponding path program 1 times [2023-11-24 23:56:47,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:47,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515368617] [2023-11-24 23:56:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:47,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:47,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:47,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515368617] [2023-11-24 23:56:47,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515368617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:47,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:47,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:56:47,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992237347] [2023-11-24 23:56:47,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:47,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:56:47,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:47,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:56:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:56:47,916 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) [2023-11-24 23:56:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:48,724 INFO L93 Difference]: Finished difference Result 523 states and 664 transitions. [2023-11-24 23:56:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:56:48,725 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 [2023-11-24 23:56:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:48,729 INFO L225 Difference]: With dead ends: 523 [2023-11-24 23:56:48,729 INFO L226 Difference]: Without dead ends: 523 [2023-11-24 23:56:48,730 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 [2023-11-24 23:56:48,730 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 [2023-11-24 23:56:48,731 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] [2023-11-24 23:56:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-11-24 23:56:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 459. [2023-11-24 23:56:48,747 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) [2023-11-24 23:56:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 583 transitions. [2023-11-24 23:56:48,751 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 583 transitions. Word has length 21 [2023-11-24 23:56:48,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:48,751 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 583 transitions. [2023-11-24 23:56:48,752 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) [2023-11-24 23:56:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 583 transitions. [2023-11-24 23:56:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 23:56:48,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:48,753 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] [2023-11-24 23:56:48,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:56:48,753 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:48,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:48,754 INFO L85 PathProgramCache]: Analyzing trace with hash 932056406, now seen corresponding path program 1 times [2023-11-24 23:56:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:48,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433597660] [2023-11-24 23:56:48,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:48,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:49,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:49,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433597660] [2023-11-24 23:56:49,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433597660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:49,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:49,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:56:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850801544] [2023-11-24 23:56:49,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:49,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:56:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:49,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:56:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:56:49,022 INFO L87 Difference]: Start difference. First operand 459 states and 583 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) [2023-11-24 23:56:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:49,783 INFO L93 Difference]: Finished difference Result 468 states and 595 transitions. [2023-11-24 23:56:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:56:49,784 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 [2023-11-24 23:56:49,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:49,787 INFO L225 Difference]: With dead ends: 468 [2023-11-24 23:56:49,787 INFO L226 Difference]: Without dead ends: 468 [2023-11-24 23:56:49,788 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 [2023-11-24 23:56:49,789 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 35 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:49,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1194 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:56:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-24 23:56:49,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 459. [2023-11-24 23:56:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 257 states have (on average 1.801556420233463) internal successors, (463), 391 states have internal predecessors, (463), 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) [2023-11-24 23:56:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 582 transitions. [2023-11-24 23:56:49,810 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 582 transitions. Word has length 21 [2023-11-24 23:56:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:49,812 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 582 transitions. [2023-11-24 23:56:49,812 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) [2023-11-24 23:56:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 582 transitions. [2023-11-24 23:56:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:56:49,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:49,816 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] [2023-11-24 23:56:49,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:56:49,816 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:49,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:49,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1026617056, now seen corresponding path program 1 times [2023-11-24 23:56:49,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:49,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592714246] [2023-11-24 23:56:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:49,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:50,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:50,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592714246] [2023-11-24 23:56:50,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592714246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:50,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:50,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:56:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647621886] [2023-11-24 23:56:50,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:50,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:56:50,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:56:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:56:50,146 INFO L87 Difference]: Start difference. First operand 459 states and 582 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:56:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:51,651 INFO L93 Difference]: Finished difference Result 661 states and 905 transitions. [2023-11-24 23:56:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:56:51,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-24 23:56:51,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:51,658 INFO L225 Difference]: With dead ends: 661 [2023-11-24 23:56:51,658 INFO L226 Difference]: Without dead ends: 661 [2023-11-24 23:56:51,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:56:51,659 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 695 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:51,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 803 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-24 23:56:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-11-24 23:56:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 564. [2023-11-24 23:56:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 333 states have (on average 1.6996996996996998) internal successors, (566), 468 states have internal predecessors, (566), 63 states have call successors, (63), 30 states have call predecessors, (63), 39 states have return successors, (138), 65 states have call predecessors, (138), 63 states have call successors, (138) [2023-11-24 23:56:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 767 transitions. [2023-11-24 23:56:51,693 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 767 transitions. Word has length 20 [2023-11-24 23:56:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:51,693 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 767 transitions. [2023-11-24 23:56:51,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:56:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 767 transitions. [2023-11-24 23:56:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:56:51,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:51,700 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] [2023-11-24 23:56:51,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:56:51,700 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ASIdleErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:51,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:51,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1181868163, now seen corresponding path program 1 times [2023-11-24 23:56:51,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:51,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645854309] [2023-11-24 23:56:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:51,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:51,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:51,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645854309] [2023-11-24 23:56:51,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645854309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:51,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:51,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:56:51,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392878716] [2023-11-24 23:56:51,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:51,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:56:51,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:51,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:56:51,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:56:51,854 INFO L87 Difference]: Start difference. First operand 564 states and 767 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-11-24 23:56:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:52,548 INFO L93 Difference]: Finished difference Result 694 states and 993 transitions. [2023-11-24 23:56:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:56:52,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 22 [2023-11-24 23:56:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:52,554 INFO L225 Difference]: With dead ends: 694 [2023-11-24 23:56:52,554 INFO L226 Difference]: Without dead ends: 694 [2023-11-24 23:56:52,555 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 [2023-11-24 23:56:52,555 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 108 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:52,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1213 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:56:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2023-11-24 23:56:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 630. [2023-11-24 23:56:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 387 states have (on average 1.6718346253229974) internal successors, (647), 524 states have internal predecessors, (647), 66 states have call successors, (66), 36 states have call predecessors, (66), 48 states have return successors, (160), 69 states have call predecessors, (160), 66 states have call successors, (160) [2023-11-24 23:56:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 873 transitions. [2023-11-24 23:56:52,591 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 873 transitions. Word has length 22 [2023-11-24 23:56:52,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:52,591 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 873 transitions. [2023-11-24 23:56:52,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-11-24 23:56:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 873 transitions. [2023-11-24 23:56:52,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:56:52,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:52,592 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] [2023-11-24 23:56:52,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 23:56:52,593 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ASIdleErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:52,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:52,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1181868162, now seen corresponding path program 1 times [2023-11-24 23:56:52,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:52,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393414435] [2023-11-24 23:56:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:52,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:52,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:52,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393414435] [2023-11-24 23:56:52,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393414435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:52,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:52,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:56:52,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044901324] [2023-11-24 23:56:52,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:52,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:56:52,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:56:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:56:52,917 INFO L87 Difference]: Start difference. First operand 630 states and 873 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2023-11-24 23:56:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:53,822 INFO L93 Difference]: Finished difference Result 489 states and 619 transitions. [2023-11-24 23:56:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:56:53,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 22 [2023-11-24 23:56:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:53,827 INFO L225 Difference]: With dead ends: 489 [2023-11-24 23:56:53,827 INFO L226 Difference]: Without dead ends: 489 [2023-11-24 23:56:53,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:56:53,828 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 421 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:53,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 783 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:56:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2023-11-24 23:56:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 413. [2023-11-24 23:56:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 223 states have (on average 1.8251121076233183) internal successors, (407), 357 states have internal predecessors, (407), 40 states have call successors, (40), 20 states have call predecessors, (40), 21 states have return successors, (55), 35 states have call predecessors, (55), 40 states have call successors, (55) [2023-11-24 23:56:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 502 transitions. [2023-11-24 23:56:53,846 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 502 transitions. Word has length 22 [2023-11-24 23:56:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:53,847 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 502 transitions. [2023-11-24 23:56:53,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2023-11-24 23:56:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 502 transitions. [2023-11-24 23:56:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 23:56:53,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:53,850 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] [2023-11-24 23:56:53,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:56:53,851 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:53,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1083527551, now seen corresponding path program 1 times [2023-11-24 23:56:53,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:53,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990650735] [2023-11-24 23:56:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:53,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:53,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:53,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990650735] [2023-11-24 23:56:53,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990650735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:53,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:53,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:53,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433531687] [2023-11-24 23:56:53,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:53,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:53,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:53,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:53,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:53,966 INFO L87 Difference]: Start difference. First operand 413 states and 502 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) [2023-11-24 23:56:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:54,142 INFO L93 Difference]: Finished difference Result 424 states and 513 transitions. [2023-11-24 23:56:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:56:54,143 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 [2023-11-24 23:56:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:54,146 INFO L225 Difference]: With dead ends: 424 [2023-11-24 23:56:54,146 INFO L226 Difference]: Without dead ends: 422 [2023-11-24 23:56:54,146 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 [2023-11-24 23:56:54,147 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 20 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:54,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 901 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:56:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-11-24 23:56:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2023-11-24 23:56:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 229 states have (on average 1.8165938864628821) internal successors, (416), 363 states have internal predecessors, (416), 40 states have call successors, (40), 21 states have call predecessors, (40), 22 states have return successors, (55), 35 states have call predecessors, (55), 40 states have call successors, (55) [2023-11-24 23:56:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 511 transitions. [2023-11-24 23:56:54,162 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 511 transitions. Word has length 30 [2023-11-24 23:56:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:54,165 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 511 transitions. [2023-11-24 23:56:54,165 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) [2023-11-24 23:56:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 511 transitions. [2023-11-24 23:56:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 23:56:54,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:54,167 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] [2023-11-24 23:56:54,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 23:56:54,168 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:54,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:54,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1855071704, now seen corresponding path program 1 times [2023-11-24 23:56:54,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:54,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621906206] [2023-11-24 23:56:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:54,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:54,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621906206] [2023-11-24 23:56:54,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621906206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:54,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:54,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:56:54,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611474828] [2023-11-24 23:56:54,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:54,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:56:54,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:56:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:56:54,492 INFO L87 Difference]: Start difference. First operand 420 states and 511 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) [2023-11-24 23:56:55,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:55,350 INFO L93 Difference]: Finished difference Result 461 states and 594 transitions. [2023-11-24 23:56:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:56:55,350 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 [2023-11-24 23:56:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:55,354 INFO L225 Difference]: With dead ends: 461 [2023-11-24 23:56:55,354 INFO L226 Difference]: Without dead ends: 455 [2023-11-24 23:56:55,354 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 [2023-11-24 23:56:55,355 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 133 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:55,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1899 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:56:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-11-24 23:56:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 418. [2023-11-24 23:56:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 228 states have (on average 1.8157894736842106) internal successors, (414), 361 states have internal predecessors, (414), 40 states have call successors, (40), 21 states have call predecessors, (40), 21 states have return successors, (54), 35 states have call predecessors, (54), 40 states have call successors, (54) [2023-11-24 23:56:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 508 transitions. [2023-11-24 23:56:55,373 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 508 transitions. Word has length 29 [2023-11-24 23:56:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:55,374 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 508 transitions. [2023-11-24 23:56:55,374 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) [2023-11-24 23:56:55,374 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 508 transitions. [2023-11-24 23:56:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:56:55,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:55,377 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] [2023-11-24 23:56:55,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 23:56:55,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:55,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash -806277217, now seen corresponding path program 1 times [2023-11-24 23:56:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:55,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690699306] [2023-11-24 23:56:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:55,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:55,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:55,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690699306] [2023-11-24 23:56:55,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690699306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:55,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:55,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:56:55,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285141812] [2023-11-24 23:56:55,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:55,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:56:55,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:55,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:56:55,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:56:55,663 INFO L87 Difference]: Start difference. First operand 418 states and 508 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) [2023-11-24 23:56:56,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:56,780 INFO L93 Difference]: Finished difference Result 600 states and 810 transitions. [2023-11-24 23:56:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:56:56,780 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 [2023-11-24 23:56:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:56,785 INFO L225 Difference]: With dead ends: 600 [2023-11-24 23:56:56,786 INFO L226 Difference]: Without dead ends: 596 [2023-11-24 23:56:56,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:56:56,787 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 309 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:56,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1532 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 23:56:56,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-11-24 23:56:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 540. [2023-11-24 23:56:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 318 states have (on average 1.720125786163522) internal successors, (547), 451 states have internal predecessors, (547), 54 states have call successors, (54), 30 states have call predecessors, (54), 39 states have return successors, (138), 58 states have call predecessors, (138), 54 states have call successors, (138) [2023-11-24 23:56:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 739 transitions. [2023-11-24 23:56:56,816 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 739 transitions. Word has length 32 [2023-11-24 23:56:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:56,816 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 739 transitions. [2023-11-24 23:56:56,816 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) [2023-11-24 23:56:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 739 transitions. [2023-11-24 23:56:56,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 23:56:56,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:56,817 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] [2023-11-24 23:56:56,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 23:56:56,818 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:56,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:56,818 INFO L85 PathProgramCache]: Analyzing trace with hash 86321188, now seen corresponding path program 1 times [2023-11-24 23:56:56,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:56,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523148624] [2023-11-24 23:56:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:57,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:57,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523148624] [2023-11-24 23:56:57,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523148624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:57,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:57,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:56:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757037676] [2023-11-24 23:56:57,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:57,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:56:57,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:57,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:56:57,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:56:57,255 INFO L87 Difference]: Start difference. First operand 540 states and 739 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) [2023-11-24 23:56:57,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:57,963 INFO L93 Difference]: Finished difference Result 564 states and 796 transitions. [2023-11-24 23:56:57,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:56:57,963 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 [2023-11-24 23:56:57,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:57,968 INFO L225 Difference]: With dead ends: 564 [2023-11-24 23:56:57,968 INFO L226 Difference]: Without dead ends: 564 [2023-11-24 23:56:57,968 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 [2023-11-24 23:56:57,969 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 433 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:57,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 261 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:56:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-11-24 23:56:57,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 521. [2023-11-24 23:56:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 318 states have (on average 1.619496855345912) internal successors, (515), 432 states have internal predecessors, (515), 54 states have call successors, (54), 30 states have call predecessors, (54), 39 states have return successors, (138), 58 states have call predecessors, (138), 54 states have call successors, (138) [2023-11-24 23:56:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 707 transitions. [2023-11-24 23:56:57,993 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 707 transitions. Word has length 33 [2023-11-24 23:56:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:57,993 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 707 transitions. [2023-11-24 23:56:57,994 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) [2023-11-24 23:56:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 707 transitions. [2023-11-24 23:56:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 23:56:57,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:57,995 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] [2023-11-24 23:56:57,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 23:56:57,995 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting system_initializeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:56:57,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1619010374, now seen corresponding path program 1 times [2023-11-24 23:56:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:57,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744823958] [2023-11-24 23:56:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:57,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:56:58,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:58,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744823958] [2023-11-24 23:56:58,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744823958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:58,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:58,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 23:56:58,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504453898] [2023-11-24 23:56:58,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:58,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 23:56:58,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:58,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 23:56:58,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:56:58,916 INFO L87 Difference]: Start difference. First operand 521 states and 707 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) [2023-11-24 23:57:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:00,208 INFO L93 Difference]: Finished difference Result 578 states and 836 transitions. [2023-11-24 23:57:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 23:57:00,208 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 [2023-11-24 23:57:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:00,217 INFO L225 Difference]: With dead ends: 578 [2023-11-24 23:57:00,217 INFO L226 Difference]: Without dead ends: 578 [2023-11-24 23:57:00,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-24 23:57:00,218 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 214 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:00,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1464 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 23:57:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-24 23:57:00,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 526. [2023-11-24 23:57:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 322 states have (on average 1.6149068322981366) internal successors, (520), 435 states have internal predecessors, (520), 55 states have call successors, (55), 31 states have call predecessors, (55), 39 states have return successors, (140), 59 states have call predecessors, (140), 55 states have call successors, (140) [2023-11-24 23:57:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 715 transitions. [2023-11-24 23:57:00,296 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 715 transitions. Word has length 34 [2023-11-24 23:57:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:00,298 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 715 transitions. [2023-11-24 23:57:00,298 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) [2023-11-24 23:57:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 715 transitions. [2023-11-24 23:57:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 23:57:00,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:00,299 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] [2023-11-24 23:57:00,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 23:57:00,299 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting system_initializeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:00,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:00,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1619010373, now seen corresponding path program 1 times [2023-11-24 23:57:00,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:00,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768084814] [2023-11-24 23:57:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:00,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:01,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:01,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768084814] [2023-11-24 23:57:01,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768084814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:01,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:01,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-24 23:57:01,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48329167] [2023-11-24 23:57:01,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:01,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 23:57:01,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:01,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 23:57:01,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:57:01,868 INFO L87 Difference]: Start difference. First operand 526 states and 715 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) [2023-11-24 23:57:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:02,966 INFO L93 Difference]: Finished difference Result 577 states and 835 transitions. [2023-11-24 23:57:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:57:02,967 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 [2023-11-24 23:57:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:02,971 INFO L225 Difference]: With dead ends: 577 [2023-11-24 23:57:02,971 INFO L226 Difference]: Without dead ends: 577 [2023-11-24 23:57:02,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:57:02,972 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 362 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:02,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 978 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:57:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-24 23:57:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 526. [2023-11-24 23:57:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 322 states have (on average 1.6118012422360248) internal successors, (519), 435 states have internal predecessors, (519), 55 states have call successors, (55), 31 states have call predecessors, (55), 39 states have return successors, (140), 59 states have call predecessors, (140), 55 states have call successors, (140) [2023-11-24 23:57:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 714 transitions. [2023-11-24 23:57:02,995 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 714 transitions. Word has length 34 [2023-11-24 23:57:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:02,995 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 714 transitions. [2023-11-24 23:57:02,995 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) [2023-11-24 23:57:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 714 transitions. [2023-11-24 23:57:02,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 23:57:02,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:02,996 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] [2023-11-24 23:57:02,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 23:57:02,997 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting system_initializeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:02,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1090804101, now seen corresponding path program 1 times [2023-11-24 23:57:02,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:02,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694694319] [2023-11-24 23:57:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:02,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:03,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:03,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694694319] [2023-11-24 23:57:03,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694694319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:03,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:03,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:57:03,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689510602] [2023-11-24 23:57:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:03,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:57:03,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:57:03,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:57:03,081 INFO L87 Difference]: Start difference. First operand 526 states and 714 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) [2023-11-24 23:57:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:03,306 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2023-11-24 23:57:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:57:03,307 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 [2023-11-24 23:57:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:03,311 INFO L225 Difference]: With dead ends: 524 [2023-11-24 23:57:03,311 INFO L226 Difference]: Without dead ends: 524 [2023-11-24 23:57:03,312 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 [2023-11-24 23:57:03,312 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 7 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:03,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 465 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:57:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-24 23:57:03,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2023-11-24 23:57:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 322 states have (on average 1.6055900621118013) internal successors, (517), 433 states have internal predecessors, (517), 55 states have call successors, (55), 31 states have call predecessors, (55), 39 states have return successors, (140), 59 states have call predecessors, (140), 55 states have call successors, (140) [2023-11-24 23:57:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 712 transitions. [2023-11-24 23:57:03,333 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 712 transitions. Word has length 36 [2023-11-24 23:57:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:03,333 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 712 transitions. [2023-11-24 23:57:03,334 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) [2023-11-24 23:57:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 712 transitions. [2023-11-24 23:57:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 23:57:03,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:03,335 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] [2023-11-24 23:57:03,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 23:57:03,335 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting system_initializeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:03,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:03,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1090804100, now seen corresponding path program 1 times [2023-11-24 23:57:03,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:03,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753849095] [2023-11-24 23:57:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:03,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:03,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:03,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753849095] [2023-11-24 23:57:03,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753849095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:03,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:03,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:57:03,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436187937] [2023-11-24 23:57:03,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:03,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:57:03,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:03,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:57:03,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:57:03,447 INFO L87 Difference]: Start difference. First operand 524 states and 712 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) [2023-11-24 23:57:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:03,680 INFO L93 Difference]: Finished difference Result 522 states and 710 transitions. [2023-11-24 23:57:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:57:03,681 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 [2023-11-24 23:57:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:03,685 INFO L225 Difference]: With dead ends: 522 [2023-11-24 23:57:03,685 INFO L226 Difference]: Without dead ends: 522 [2023-11-24 23:57:03,685 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 [2023-11-24 23:57:03,686 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 5 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:03,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 471 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:57:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2023-11-24 23:57:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2023-11-24 23:57:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 322 states have (on average 1.5993788819875776) internal successors, (515), 431 states have internal predecessors, (515), 55 states have call successors, (55), 31 states have call predecessors, (55), 39 states have return successors, (140), 59 states have call predecessors, (140), 55 states have call successors, (140) [2023-11-24 23:57:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 710 transitions. [2023-11-24 23:57:03,708 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 710 transitions. Word has length 36 [2023-11-24 23:57:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:03,709 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 710 transitions. [2023-11-24 23:57:03,709 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) [2023-11-24 23:57:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 710 transitions. [2023-11-24 23:57:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 23:57:03,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:03,710 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] [2023-11-24 23:57:03,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 23:57:03,710 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ASNullErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:03,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1324675112, now seen corresponding path program 1 times [2023-11-24 23:57:03,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:03,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202359024] [2023-11-24 23:57:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:03,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:03,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:03,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202359024] [2023-11-24 23:57:03,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202359024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:03,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:03,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:57:03,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128975820] [2023-11-24 23:57:03,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:03,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:57:03,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:03,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:57:03,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:57:03,902 INFO L87 Difference]: Start difference. First operand 522 states and 710 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) [2023-11-24 23:57:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:04,554 INFO L93 Difference]: Finished difference Result 553 states and 759 transitions. [2023-11-24 23:57:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:57:04,557 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 [2023-11-24 23:57:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:04,560 INFO L225 Difference]: With dead ends: 553 [2023-11-24 23:57:04,561 INFO L226 Difference]: Without dead ends: 553 [2023-11-24 23:57:04,561 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 [2023-11-24 23:57:04,562 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 45 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:04,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1147 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:57:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-11-24 23:57:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 542. [2023-11-24 23:57:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 338 states have (on average 1.5917159763313609) internal successors, (538), 448 states have internal predecessors, (538), 56 states have call successors, (56), 33 states have call predecessors, (56), 42 states have return successors, (145), 60 states have call predecessors, (145), 56 states have call successors, (145) [2023-11-24 23:57:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 739 transitions. [2023-11-24 23:57:04,585 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 739 transitions. Word has length 44 [2023-11-24 23:57:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:04,585 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 739 transitions. [2023-11-24 23:57:04,585 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) [2023-11-24 23:57:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 739 transitions. [2023-11-24 23:57:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 23:57:04,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:04,586 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] [2023-11-24 23:57:04,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 23:57:04,587 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ASNullErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:04,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:04,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1324675111, now seen corresponding path program 1 times [2023-11-24 23:57:04,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:04,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718599090] [2023-11-24 23:57:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:04,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:04,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:04,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718599090] [2023-11-24 23:57:04,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718599090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:04,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:04,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:57:04,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153771291] [2023-11-24 23:57:04,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:04,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:57:04,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:04,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:57:04,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:57:04,902 INFO L87 Difference]: Start difference. First operand 542 states and 739 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) [2023-11-24 23:57:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:05,636 INFO L93 Difference]: Finished difference Result 552 states and 758 transitions. [2023-11-24 23:57:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:57:05,637 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 [2023-11-24 23:57:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:05,642 INFO L225 Difference]: With dead ends: 552 [2023-11-24 23:57:05,642 INFO L226 Difference]: Without dead ends: 552 [2023-11-24 23:57:05,643 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 [2023-11-24 23:57:05,643 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 42 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:05,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1199 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:57:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-11-24 23:57:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 542. [2023-11-24 23:57:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 338 states have (on average 1.5887573964497042) internal successors, (537), 448 states have internal predecessors, (537), 56 states have call successors, (56), 33 states have call predecessors, (56), 42 states have return successors, (145), 60 states have call predecessors, (145), 56 states have call successors, (145) [2023-11-24 23:57:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 738 transitions. [2023-11-24 23:57:05,664 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 738 transitions. Word has length 44 [2023-11-24 23:57:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:05,665 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 738 transitions. [2023-11-24 23:57:05,665 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) [2023-11-24 23:57:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 738 transitions. [2023-11-24 23:57:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-24 23:57:05,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:05,666 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] [2023-11-24 23:57:05,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 23:57:05,667 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:05,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1873386045, now seen corresponding path program 1 times [2023-11-24 23:57:05,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:05,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99015134] [2023-11-24 23:57:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:05,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:05,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:05,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99015134] [2023-11-24 23:57:05,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99015134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:05,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:05,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:57:05,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608508885] [2023-11-24 23:57:05,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:05,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:57:05,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:05,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:57:05,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:57:05,915 INFO L87 Difference]: Start difference. First operand 542 states and 738 transitions. Second operand has 7 states, 5 states have (on average 7.2) 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) [2023-11-24 23:57:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:06,675 INFO L93 Difference]: Finished difference Result 620 states and 849 transitions. [2023-11-24 23:57:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:57:06,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.2) 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 [2023-11-24 23:57:06,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:06,683 INFO L225 Difference]: With dead ends: 620 [2023-11-24 23:57:06,683 INFO L226 Difference]: Without dead ends: 620 [2023-11-24 23:57:06,683 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 [2023-11-24 23:57:06,685 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 165 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:06,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1066 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:57:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2023-11-24 23:57:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 553. [2023-11-24 23:57:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 346 states have (on average 1.583815028901734) internal successors, (548), 457 states have internal predecessors, (548), 57 states have call successors, (57), 34 states have call predecessors, (57), 44 states have return successors, (151), 61 states have call predecessors, (151), 57 states have call successors, (151) [2023-11-24 23:57:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 756 transitions. [2023-11-24 23:57:06,712 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 756 transitions. Word has length 45 [2023-11-24 23:57:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:06,712 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 756 transitions. [2023-11-24 23:57:06,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.2) 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) [2023-11-24 23:57:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 756 transitions. [2023-11-24 23:57:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-24 23:57:06,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:06,713 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] [2023-11-24 23:57:06,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-24 23:57:06,714 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:06,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:06,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1873386046, now seen corresponding path program 1 times [2023-11-24 23:57:06,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:06,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363216777] [2023-11-24 23:57:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:06,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:07,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:07,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363216777] [2023-11-24 23:57:07,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363216777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:07,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:07,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:57:07,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121786886] [2023-11-24 23:57:07,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:07,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:57:07,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:57:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:57:07,084 INFO L87 Difference]: Start difference. First operand 553 states and 756 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) [2023-11-24 23:57:07,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:07,781 INFO L93 Difference]: Finished difference Result 562 states and 768 transitions. [2023-11-24 23:57:07,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:57:07,782 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 [2023-11-24 23:57:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:07,786 INFO L225 Difference]: With dead ends: 562 [2023-11-24 23:57:07,787 INFO L226 Difference]: Without dead ends: 562 [2023-11-24 23:57:07,787 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 [2023-11-24 23:57:07,788 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 39 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:07,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1178 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:57:07,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2023-11-24 23:57:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 553. [2023-11-24 23:57:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 346 states have (on average 1.5809248554913296) internal successors, (547), 457 states have internal predecessors, (547), 57 states have call successors, (57), 34 states have call predecessors, (57), 44 states have return successors, (151), 61 states have call predecessors, (151), 57 states have call successors, (151) [2023-11-24 23:57:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 755 transitions. [2023-11-24 23:57:07,825 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 755 transitions. Word has length 45 [2023-11-24 23:57:07,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:07,826 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 755 transitions. [2023-11-24 23:57:07,826 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) [2023-11-24 23:57:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 755 transitions. [2023-11-24 23:57:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-24 23:57:07,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:07,827 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] [2023-11-24 23:57:07,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-24 23:57:07,828 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ASIdleErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:07,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:07,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2065420395, now seen corresponding path program 1 times [2023-11-24 23:57:07,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:07,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595093045] [2023-11-24 23:57:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:07,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:08,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:08,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595093045] [2023-11-24 23:57:08,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595093045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:08,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:08,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:57:08,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969497582] [2023-11-24 23:57:08,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:08,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:57:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:08,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:57:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:57:08,039 INFO L87 Difference]: Start difference. First operand 553 states and 755 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) [2023-11-24 23:57:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:08,718 INFO L93 Difference]: Finished difference Result 612 states and 851 transitions. [2023-11-24 23:57:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:57:08,719 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 [2023-11-24 23:57:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:08,723 INFO L225 Difference]: With dead ends: 612 [2023-11-24 23:57:08,723 INFO L226 Difference]: Without dead ends: 612 [2023-11-24 23:57:08,724 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 [2023-11-24 23:57:08,724 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 113 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:08,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1089 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:57:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2023-11-24 23:57:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 562. [2023-11-24 23:57:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 353 states have (on average 1.5807365439093484) internal successors, (558), 464 states have internal predecessors, (558), 58 states have call successors, (58), 35 states have call predecessors, (58), 45 states have return successors, (154), 62 states have call predecessors, (154), 58 states have call successors, (154) [2023-11-24 23:57:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 770 transitions. [2023-11-24 23:57:08,754 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 770 transitions. Word has length 46 [2023-11-24 23:57:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:08,754 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 770 transitions. [2023-11-24 23:57:08,755 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) [2023-11-24 23:57:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 770 transitions. [2023-11-24 23:57:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-24 23:57:08,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:08,756 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] [2023-11-24 23:57:08,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-24 23:57:08,756 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ASIdleErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:08,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:08,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2065420394, now seen corresponding path program 1 times [2023-11-24 23:57:08,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:08,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564071078] [2023-11-24 23:57:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:08,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:09,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:09,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564071078] [2023-11-24 23:57:09,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564071078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:09,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:09,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:57:09,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893016706] [2023-11-24 23:57:09,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:09,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:57:09,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:09,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:57:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:57:09,094 INFO L87 Difference]: Start difference. First operand 562 states and 770 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) [2023-11-24 23:57:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:09,811 INFO L93 Difference]: Finished difference Result 622 states and 866 transitions. [2023-11-24 23:57:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:57:09,812 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 [2023-11-24 23:57:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:09,816 INFO L225 Difference]: With dead ends: 622 [2023-11-24 23:57:09,817 INFO L226 Difference]: Without dead ends: 622 [2023-11-24 23:57:09,817 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 [2023-11-24 23:57:09,818 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 52 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:09,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1162 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:57:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2023-11-24 23:57:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 605. [2023-11-24 23:57:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 386 states have (on average 1.5621761658031088) internal successors, (603), 499 states have internal predecessors, (603), 62 states have call successors, (62), 38 states have call predecessors, (62), 51 states have return successors, (174), 67 states have call predecessors, (174), 62 states have call successors, (174) [2023-11-24 23:57:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 839 transitions. [2023-11-24 23:57:09,846 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 839 transitions. Word has length 46 [2023-11-24 23:57:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:09,847 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 839 transitions. [2023-11-24 23:57:09,847 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) [2023-11-24 23:57:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 839 transitions. [2023-11-24 23:57:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-24 23:57:09,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:09,848 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] [2023-11-24 23:57:09,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-24 23:57:09,849 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ASStopErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:09,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:09,849 INFO L85 PathProgramCache]: Analyzing trace with hash 385410619, now seen corresponding path program 1 times [2023-11-24 23:57:09,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:09,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646759133] [2023-11-24 23:57:09,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:09,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:10,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:10,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646759133] [2023-11-24 23:57:10,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646759133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:10,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:10,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:57:10,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424408019] [2023-11-24 23:57:10,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:10,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:57:10,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:10,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:57:10,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:57:10,172 INFO L87 Difference]: Start difference. First operand 605 states and 839 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) [2023-11-24 23:57:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:10,852 INFO L93 Difference]: Finished difference Result 666 states and 929 transitions. [2023-11-24 23:57:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:57:10,852 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 [2023-11-24 23:57:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:10,857 INFO L225 Difference]: With dead ends: 666 [2023-11-24 23:57:10,857 INFO L226 Difference]: Without dead ends: 666 [2023-11-24 23:57:10,858 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 [2023-11-24 23:57:10,858 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 67 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:10,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1157 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:57:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-11-24 23:57:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 650. [2023-11-24 23:57:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 420 states have (on average 1.5476190476190477) internal successors, (650), 537 states have internal predecessors, (650), 65 states have call successors, (65), 40 states have call predecessors, (65), 59 states have return successors, (190), 72 states have call predecessors, (190), 65 states have call successors, (190) [2023-11-24 23:57:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 905 transitions. [2023-11-24 23:57:10,885 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 905 transitions. Word has length 47 [2023-11-24 23:57:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:10,886 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 905 transitions. [2023-11-24 23:57:10,886 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) [2023-11-24 23:57:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 905 transitions. [2023-11-24 23:57:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-24 23:57:10,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:10,887 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] [2023-11-24 23:57:10,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-24 23:57:10,887 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ASStopErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:10,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash 385410618, now seen corresponding path program 1 times [2023-11-24 23:57:10,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:10,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398968311] [2023-11-24 23:57:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:10,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:11,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:11,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398968311] [2023-11-24 23:57:11,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398968311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:11,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:11,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:57:11,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569110914] [2023-11-24 23:57:11,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:11,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:57:11,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:57:11,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:57:11,106 INFO L87 Difference]: Start difference. First operand 650 states and 905 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) [2023-11-24 23:57:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:11,783 INFO L93 Difference]: Finished difference Result 711 states and 998 transitions. [2023-11-24 23:57:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:57:11,783 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 [2023-11-24 23:57:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:11,789 INFO L225 Difference]: With dead ends: 711 [2023-11-24 23:57:11,789 INFO L226 Difference]: Without dead ends: 711 [2023-11-24 23:57:11,789 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 [2023-11-24 23:57:11,790 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 81 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:11,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1107 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:57:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2023-11-24 23:57:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 692. [2023-11-24 23:57:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 453 states have (on average 1.534216335540839) internal successors, (695), 573 states have internal predecessors, (695), 66 states have call successors, (66), 42 states have call predecessors, (66), 67 states have return successors, (202), 76 states have call predecessors, (202), 66 states have call successors, (202) [2023-11-24 23:57:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 963 transitions. [2023-11-24 23:57:11,817 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 963 transitions. Word has length 47 [2023-11-24 23:57:11,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:11,817 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 963 transitions. [2023-11-24 23:57:11,817 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) [2023-11-24 23:57:11,818 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 963 transitions. [2023-11-24 23:57:11,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 23:57:11,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:11,819 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] [2023-11-24 23:57:11,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-24 23:57:11,819 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:11,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:11,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2037623550, now seen corresponding path program 1 times [2023-11-24 23:57:11,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:11,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21918220] [2023-11-24 23:57:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:11,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:57:12,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:12,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21918220] [2023-11-24 23:57:12,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21918220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:12,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:12,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:57:12,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821791643] [2023-11-24 23:57:12,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:12,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:57:12,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:12,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:57:12,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:57:12,146 INFO L87 Difference]: Start difference. First operand 692 states and 963 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 23:57:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:12,639 INFO L93 Difference]: Finished difference Result 780 states and 1119 transitions. [2023-11-24 23:57:12,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:57:12,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 3 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 [2023-11-24 23:57:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:12,646 INFO L225 Difference]: With dead ends: 780 [2023-11-24 23:57:12,646 INFO L226 Difference]: Without dead ends: 780 [2023-11-24 23:57:12,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:57:12,647 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 43 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:12,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1819 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:57:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-11-24 23:57:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 756. [2023-11-24 23:57:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 505 states have (on average 1.5227722772277228) internal successors, (769), 626 states have internal predecessors, (769), 70 states have call successors, (70), 50 states have call predecessors, (70), 75 states have return successors, (218), 79 states have call predecessors, (218), 70 states have call successors, (218) [2023-11-24 23:57:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1057 transitions. [2023-11-24 23:57:12,690 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1057 transitions. Word has length 51 [2023-11-24 23:57:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:12,691 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 1057 transitions. [2023-11-24 23:57:12,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 23:57:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1057 transitions. [2023-11-24 23:57:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-24 23:57:12,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:12,695 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, 1, 1, 1] [2023-11-24 23:57:12,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-24 23:57:12,695 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ASIdleErr12ASSERT_VIOLATIONMEMORY_LEAK === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:12,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash 493514637, now seen corresponding path program 1 times [2023-11-24 23:57:12,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:12,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687932414] [2023-11-24 23:57:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:12,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:13,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:13,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687932414] [2023-11-24 23:57:13,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687932414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:13,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:13,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:57:13,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397557933] [2023-11-24 23:57:13,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:13,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:57:13,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:57:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:57:13,116 INFO L87 Difference]: Start difference. First operand 756 states and 1057 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 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) [2023-11-24 23:57:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:13,637 INFO L93 Difference]: Finished difference Result 792 states and 1116 transitions. [2023-11-24 23:57:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:57:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 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 50 [2023-11-24 23:57:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:13,644 INFO L225 Difference]: With dead ends: 792 [2023-11-24 23:57:13,644 INFO L226 Difference]: Without dead ends: 792 [2023-11-24 23:57:13,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:57:13,645 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 46 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:13,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 2109 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:57:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2023-11-24 23:57:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 777. [2023-11-24 23:57:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 519 states have (on average 1.510597302504817) internal successors, (784), 641 states have internal predecessors, (784), 74 states have call successors, (74), 51 states have call predecessors, (74), 78 states have return successors, (234), 84 states have call predecessors, (234), 74 states have call successors, (234) [2023-11-24 23:57:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1092 transitions. [2023-11-24 23:57:13,678 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1092 transitions. Word has length 50 [2023-11-24 23:57:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:13,678 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 1092 transitions. [2023-11-24 23:57:13,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 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) [2023-11-24 23:57:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1092 transitions. [2023-11-24 23:57:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-24 23:57:13,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:13,680 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, 1, 1, 1] [2023-11-24 23:57:13,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-24 23:57:13,680 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ASStopErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:13,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1332924025, now seen corresponding path program 1 times [2023-11-24 23:57:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051473648] [2023-11-24 23:57:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:57:13,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:13,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051473648] [2023-11-24 23:57:13,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051473648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:13,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:13,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:57:13,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916320615] [2023-11-24 23:57:13,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:13,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:57:13,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:13,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:57:13,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:57:13,811 INFO L87 Difference]: Start difference. First operand 777 states and 1092 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 23:57:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:14,256 INFO L93 Difference]: Finished difference Result 825 states and 1212 transitions. [2023-11-24 23:57:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:57:14,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 2 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 50 [2023-11-24 23:57:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:14,263 INFO L225 Difference]: With dead ends: 825 [2023-11-24 23:57:14,263 INFO L226 Difference]: Without dead ends: 825 [2023-11-24 23:57:14,264 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 [2023-11-24 23:57:14,265 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 315 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:14,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 351 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:57:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2023-11-24 23:57:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 776. [2023-11-24 23:57:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 519 states have (on average 1.5048169556840076) internal successors, (781), 640 states have internal predecessors, (781), 74 states have call successors, (74), 51 states have call predecessors, (74), 78 states have return successors, (234), 84 states have call predecessors, (234), 74 states have call successors, (234) [2023-11-24 23:57:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1089 transitions. [2023-11-24 23:57:14,317 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1089 transitions. Word has length 50 [2023-11-24 23:57:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:14,317 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1089 transitions. [2023-11-24 23:57:14,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 23:57:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1089 transitions. [2023-11-24 23:57:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 23:57:14,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:14,320 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] [2023-11-24 23:57:14,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-24 23:57:14,320 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:14,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1956533854, now seen corresponding path program 1 times [2023-11-24 23:57:14,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:14,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072259686] [2023-11-24 23:57:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:14,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:57:14,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:14,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072259686] [2023-11-24 23:57:14,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072259686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:14,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:14,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:57:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94080278] [2023-11-24 23:57:14,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:14,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:57:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:57:14,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:57:14,476 INFO L87 Difference]: Start difference. First operand 776 states and 1089 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) [2023-11-24 23:57:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:14,796 INFO L93 Difference]: Finished difference Result 774 states and 1087 transitions. [2023-11-24 23:57:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:57:14,797 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 [2023-11-24 23:57:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:14,803 INFO L225 Difference]: With dead ends: 774 [2023-11-24 23:57:14,803 INFO L226 Difference]: Without dead ends: 774 [2023-11-24 23:57:14,803 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 [2023-11-24 23:57:14,804 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 33 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:14,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 621 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:57:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-11-24 23:57:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2023-11-24 23:57:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 519 states have (on average 1.5009633911368014) internal successors, (779), 638 states have internal predecessors, (779), 74 states have call successors, (74), 51 states have call predecessors, (74), 78 states have return successors, (234), 84 states have call predecessors, (234), 74 states have call successors, (234) [2023-11-24 23:57:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1087 transitions. [2023-11-24 23:57:14,844 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1087 transitions. Word has length 51 [2023-11-24 23:57:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:14,844 INFO L495 AbstractCegarLoop]: Abstraction has 774 states and 1087 transitions. [2023-11-24 23:57:14,844 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) [2023-11-24 23:57:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1087 transitions. [2023-11-24 23:57:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 23:57:14,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:14,846 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] [2023-11-24 23:57:14,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-24 23:57:14,847 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ASStartErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [event_precessErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, event_precessErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 23:57:14,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1956533855, now seen corresponding path program 1 times [2023-11-24 23:57:14,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:14,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265805937] [2023-11-24 23:57:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:57:16,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:16,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265805937] [2023-11-24 23:57:16,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265805937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:57:16,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107869380] [2023-11-24 23:57:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:16,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:16,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:16,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:57:16,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff0cef67-330a-455d-840b-c08b565ffd24/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:57:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:16,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-24 23:57:16,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:57:16,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 23:57:16,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-24 23:57:16,584 INFO L378 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 [2023-11-24 23:57:16,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-24 23:57:16,634 INFO L378 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 42 treesize of output 20 [2023-11-24 23:57:16,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-24 23:57:16,724 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-24 23:57:16,724 INFO L378 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 [2023-11-24 23:57:16,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2023-11-24 23:57:16,785 INFO L378 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 [2023-11-24 23:57:16,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-24 23:57:16,825 INFO L378 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 [2023-11-24 23:57:16,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-24 23:57:16,868 INFO L378 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 [2023-11-24 23:57:16,885 INFO L349 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2023-11-24 23:57:16,886 INFO L378 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 [2023-11-24 23:57:16,894 INFO L378 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 [2023-11-24 23:57:16,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 32 [2023-11-24 23:57:16,916 INFO L378 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 [2023-11-24 23:57:17,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-24 23:57:17,114 INFO L378 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 [2023-11-24 23:57:17,180 INFO L378 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 [2023-11-24 23:57:17,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-24 23:57:17,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2023-11-24 23:57:17,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-24 23:57:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:17,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:57:17,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107869380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:17,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:57:17,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [16] total 25 [2023-11-24 23:57:17,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421221966] [2023-11-24 23:57:17,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:17,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 23:57:17,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:17,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 23:57:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-11-24 23:57:17,260 INFO L87 Difference]: Start difference. First operand 774 states and 1087 transitions. Second operand has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 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)