./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:12:28,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:12:28,967 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:12:28,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:12:28,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:12:28,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:12:29,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:12:29,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:12:29,001 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:12:29,002 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:12:29,003 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:12:29,003 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:12:29,004 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:12:29,005 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:12:29,005 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:12:29,006 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:12:29,007 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:12:29,007 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:12:29,008 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:12:29,009 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:12:29,009 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:12:29,010 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:12:29,011 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:12:29,012 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:12:29,013 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:12:29,013 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:12:29,014 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:12:29,014 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:12:29,015 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:12:29,016 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:12:29,016 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:12:29,017 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:12:29,017 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:12:29,018 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:12:29,018 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:12:29,019 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:12:29,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:29,020 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:12:29,020 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:12:29,020 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:12:29,021 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:12:29,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:12:29,022 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:12:29,022 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:12:29,022 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:12:29,022 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_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2023-11-12 00:12:29,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:12:29,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:12:29,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:12:29,436 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:12:29,437 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:12:29,439 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2023-11-12 00:12:32,650 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:12:32,946 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:12:32,947 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2023-11-12 00:12:32,961 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/data/5e442aaa7/eff66bef8814470fb8b56c3ba0635572/FLAG0b077a6ab [2023-11-12 00:12:32,976 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/data/5e442aaa7/eff66bef8814470fb8b56c3ba0635572 [2023-11-12 00:12:32,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:12:32,981 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:12:32,982 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:32,982 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:12:32,988 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:12:32,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:32" (1/1) ... [2023-11-12 00:12:32,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490bf5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:32, skipping insertion in model container [2023-11-12 00:12:32,990 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:32" (1/1) ... [2023-11-12 00:12:33,031 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:12:33,377 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2023-11-12 00:12:33,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:33,393 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:12:33,439 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2023-11-12 00:12:33,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:33,474 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:12:33,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33 WrapperNode [2023-11-12 00:12:33,475 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:33,476 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:33,476 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:12:33,476 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:12:33,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,498 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,537 INFO L138 Inliner]: procedures = 128, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2023-11-12 00:12:33,538 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:33,538 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:12:33,539 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:12:33,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:12:33,548 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,553 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,554 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,574 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:12:33,575 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:12:33,575 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:12:33,576 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:12:33,576 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (1/1) ... [2023-11-12 00:12:33,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:33,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:33,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:12:33,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:12:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:12:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:12:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-12 00:12:33,662 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-12 00:12:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:12:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:12:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:12:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:12:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:12:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:12:33,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:12:33,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:12:33,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:12:33,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:12:33,913 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:12:33,915 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:12:34,177 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:12:34,281 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:12:34,282 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 00:12:34,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:34 BoogieIcfgContainer [2023-11-12 00:12:34,285 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:12:34,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:12:34,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:12:34,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:12:34,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:12:32" (1/3) ... [2023-11-12 00:12:34,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6742b204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:34, skipping insertion in model container [2023-11-12 00:12:34,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:33" (2/3) ... [2023-11-12 00:12:34,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6742b204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:34, skipping insertion in model container [2023-11-12 00:12:34,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:34" (3/3) ... [2023-11-12 00:12:34,299 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2023-11-12 00:12:34,321 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:12:34,321 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:12:34,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:12:34,389 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@65b7afd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:12:34,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:12:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:12:34,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:34,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:34,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:34,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1821383254, now seen corresponding path program 1 times [2023-11-12 00:12:34,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:34,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746044055] [2023-11-12 00:12:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:34,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:34,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:34,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746044055] [2023-11-12 00:12:34,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746044055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:34,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:34,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:12:34,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780069075] [2023-11-12 00:12:34,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:34,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:12:34,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:12:34,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:12:34,940 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:12:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:35,047 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-11-12 00:12:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:12:35,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2023-11-12 00:12:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:35,060 INFO L225 Difference]: With dead ends: 43 [2023-11-12 00:12:35,060 INFO L226 Difference]: Without dead ends: 21 [2023-11-12 00:12:35,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:12:35,072 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:35,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:12:35,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-12 00:12:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-11-12 00:12:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2023-11-12 00:12:35,125 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 11 [2023-11-12 00:12:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:35,127 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2023-11-12 00:12:35,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:12:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2023-11-12 00:12:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:12:35,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:35,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:35,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:12:35,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:35,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:35,134 INFO L85 PathProgramCache]: Analyzing trace with hash -239807907, now seen corresponding path program 1 times [2023-11-12 00:12:35,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:35,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665042998] [2023-11-12 00:12:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:35,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:12:35,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:35,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665042998] [2023-11-12 00:12:35,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665042998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:35,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296645906] [2023-11-12 00:12:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:35,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:35,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:35,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:35,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:12:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:35,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:12:35,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:35,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:12:35,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296645906] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:35,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821534876] [2023-11-12 00:12:35,959 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-12 00:12:35,960 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:35,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:35,972 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:35,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:38,759 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 38 for LOIs [2023-11-12 00:12:38,811 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:40,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1821534876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:40,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:12:40,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 4, 4] total 14 [2023-11-12 00:12:40,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145298997] [2023-11-12 00:12:40,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:40,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:12:40,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:40,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:12:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=146, Unknown=3, NotChecked=0, Total=182 [2023-11-12 00:12:40,070 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:40,944 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2023-11-12 00:12:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:12:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-12 00:12:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:40,946 INFO L225 Difference]: With dead ends: 28 [2023-11-12 00:12:40,947 INFO L226 Difference]: Without dead ends: 20 [2023-11-12 00:12:40,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=33, Invalid=146, Unknown=3, NotChecked=0, Total=182 [2023-11-12 00:12:40,949 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:40,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 3 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:12:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-12 00:12:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-12 00:12:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2023-11-12 00:12:40,960 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 17 [2023-11-12 00:12:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:40,961 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2023-11-12 00:12:40,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2023-11-12 00:12:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:12:40,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:40,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:40,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:41,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:41,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:41,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:41,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1057843026, now seen corresponding path program 1 times [2023-11-12 00:12:41,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:41,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199088454] [2023-11-12 00:12:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:41,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:12:41,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:41,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199088454] [2023-11-12 00:12:41,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199088454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:41,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633712286] [2023-11-12 00:12:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:41,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:41,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:41,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:41,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:12:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:41,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:12:41,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:12:41,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:12:41,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633712286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:41,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872266471] [2023-11-12 00:12:41,541 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-12 00:12:41,541 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:41,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:41,542 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:41,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:43,538 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2023-11-12 00:12:43,729 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:46,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '399#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~mid_index~0#1| 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|) 1)) (= |ULTIMATE.start_main_~uneq~0#1| 5) (exists ((|v_#memory_$Pointer$.base_53| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_28| Int) (|v_#memory_$Pointer$.offset_53| (Array Int (Array Int Int))) (|v_#memory_int_53| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~head#1.base_23| Int) (|v_#memory_$Pointer$.base_92| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28| Int) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_28| Int) (|v_#memory_int_101| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_92| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28| (store (select |v_#memory_$Pointer$.offset_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28|) 4 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28|) 4)))) (or (and (or (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_28| 0)) (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_28| 0))) (= (store |v_#memory_$Pointer$.base_92| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_28| (store (select |v_#memory_$Pointer$.base_92| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_28|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_28| 4) |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28|)) |v_#memory_$Pointer$.base_53|) (= (store |v_#memory_int_101| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_28| (store (select |v_#memory_int_101| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_28|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_28| 4) (select (select |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_28|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_28| 4)))) |v_#memory_int_53|) (= (store |v_#memory_$Pointer$.offset_92| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_28| (store (select |v_#memory_$Pointer$.offset_92| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_28|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_28| 4) 0)) |v_#memory_$Pointer$.offset_53|)) (and (= (store |v_#memory_$Pointer$.offset_92| |v_ULTIMATE.start_sll_insert_~head#1.base_23| (store (select |v_#memory_$Pointer$.offset_92| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0 0)) |v_#memory_$Pointer$.offset_53|) (= (store |v_#memory_$Pointer$.base_92| |v_ULTIMATE.start_sll_insert_~head#1.base_23| (store (select |v_#memory_$Pointer$.base_92| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0 |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28|)) |v_#memory_$Pointer$.base_53|) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_28| 0) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_28| 0) (= (store |v_#memory_int_101| |v_ULTIMATE.start_sll_insert_~head#1.base_23| (store (select |v_#memory_int_101| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0 (select (select |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0))) |v_#memory_int_53|))) (= (store |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28| (store (select |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28|) 4 (select (select |#memory_int| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28|) 4))) |#memory_int|) (<= 2 |v_ULTIMATE.start_sll_insert_~head#1.base_23|) (= (store |v_#memory_$Pointer$.base_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28| (store (select |v_#memory_$Pointer$.base_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28|) 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_28|) 4))) |#memory_$Pointer$.base|))) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-12 00:12:46,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:12:46,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:12:46,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-12 00:12:46,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608065402] [2023-11-12 00:12:46,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:12:46,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:12:46,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:46,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:12:46,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:12:46,766 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 00:12:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:46,852 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-11-12 00:12:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:12:46,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2023-11-12 00:12:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:46,854 INFO L225 Difference]: With dead ends: 38 [2023-11-12 00:12:46,854 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 00:12:46,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:12:46,858 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:46,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:12:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 00:12:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-12 00:12:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:12:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-11-12 00:12:46,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 18 [2023-11-12 00:12:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:46,878 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-11-12 00:12:46,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 00:12:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-11-12 00:12:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:12:46,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:46,882 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:46,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:12:47,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:47,089 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:47,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:47,089 INFO L85 PathProgramCache]: Analyzing trace with hash 416409963, now seen corresponding path program 2 times [2023-11-12 00:12:47,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:47,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095804166] [2023-11-12 00:12:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:12:49,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:49,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095804166] [2023-11-12 00:12:49,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095804166] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:49,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441430332] [2023-11-12 00:12:49,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:12:49,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:49,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:49,405 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:49,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:12:49,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:12:49,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:12:49,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 99 conjunts are in the unsatisfiable core [2023-11-12 00:12:49,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:49,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-12 00:12:49,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:12:50,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 00:12:50,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-11-12 00:12:50,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-12 00:12:50,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-12 00:12:50,296 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2023-11-12 00:12:50,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:12:50,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 00:12:50,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:12:50,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 35 [2023-11-12 00:12:50,514 INFO L322 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-12 00:12:50,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-12 00:12:50,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 00:12:50,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:12:50,942 INFO L322 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2023-11-12 00:12:50,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 77 [2023-11-12 00:12:50,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 52 [2023-11-12 00:12:50,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:12:50,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:12:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:12:50,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-12 00:12:51,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 00:12:51,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 00:12:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:12:51,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:51,278 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0)) (.cse0 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0))) (and (or (forall ((v_DerPreprocessor_3 (Array Int Int)) (v_DerPreprocessor_5 (Array Int Int)) (v_ArrVal_384 (Array Int Int)) (v_DerPreprocessor_4 Int) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4) v_DerPreprocessor_4)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_377) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_DerPreprocessor_3) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_DerPreprocessor_5) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (and .cse0 .cse1)) (or (forall ((v_DerPreprocessor_7 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int)) (v_ArrVal_384 (Array Int Int)) (v_DerPreprocessor_8 (Array Int Int)) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_7) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_377) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_6) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_8) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (not .cse1) (not .cse0)))) is different from false [2023-11-12 00:12:51,314 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_sll_insert_~last~0#1.base| 0)) (.cse1 (= |c_ULTIMATE.start_sll_insert_~last~0#1.offset| 0))) (and (or (not .cse0) (forall ((v_DerPreprocessor_7 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int)) (v_ArrVal_384 (Array Int Int)) (v_DerPreprocessor_8 (Array Int Int)) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_7) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_377) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_6) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_8) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (not .cse1)) (or (and .cse0 .cse1) (forall ((v_DerPreprocessor_3 (Array Int Int)) (v_DerPreprocessor_5 (Array Int Int)) (v_ArrVal_384 (Array Int Int)) (v_DerPreprocessor_4 Int) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_insert_~last~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~last~0#1.offset| 4) v_DerPreprocessor_4)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_377) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_DerPreprocessor_3) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_DerPreprocessor_5) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2023-11-12 00:12:51,351 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|))) (let ((.cse2 (= .cse1 0)) (.cse3 (= .cse0 0))) (and (or (forall ((v_DerPreprocessor_3 (Array Int Int)) (v_DerPreprocessor_5 (Array Int Int)) (v_ArrVal_384 (Array Int Int)) (v_DerPreprocessor_4 Int) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) (+ .cse1 4) v_DerPreprocessor_4)) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_377) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_3) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_5) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (and .cse2 .cse3)) (or (not .cse2) (not .cse3) (forall ((v_DerPreprocessor_7 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int)) (v_ArrVal_384 (Array Int Int)) (v_DerPreprocessor_8 (Array Int Int)) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_7) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_377) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_6) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_8) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))) is different from false [2023-11-12 00:12:51,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441430332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:51,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012375522] [2023-11-12 00:12:51,949 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-12 00:12:51,949 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:51,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:51,949 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:51,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:53,614 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 62 for LOIs [2023-11-12 00:12:53,754 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:01,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '620#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~mid_index~0#1| 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|) 1)) (= |ULTIMATE.start_main_~uneq~0#1| 5) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.base_53| (Array Int (Array Int Int))) (|v_#memory_int_129| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_53| (Array Int (Array Int Int))) (|v_#memory_int_53| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~head#1.base_25| Int) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_33| Int) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_33| Int) (|v_#memory_$Pointer$.offset_110| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31| Int) (|v_#memory_$Pointer$.base_110| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31| (store (select |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31|) 4 (select (select |#memory_int| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31|) 4)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31| (store (select |v_#memory_$Pointer$.offset_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31|) 4 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31|) 4)))) (or (and (= (store |v_#memory_$Pointer$.base_110| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_33| (store (select |v_#memory_$Pointer$.base_110| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_33|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_33| 4) |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31|)) |v_#memory_$Pointer$.base_53|) (= (store |v_#memory_$Pointer$.offset_110| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_33| (store (select |v_#memory_$Pointer$.offset_110| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_33|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_33| 4) 0)) |v_#memory_$Pointer$.offset_53|) (or (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_33| 0)) (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_33| 0))) (= |v_#memory_int_53| (store |v_#memory_int_129| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_33| (store (select |v_#memory_int_129| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_33|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_33| 4) (select (select |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_33|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_33| 4)))))) (and (= (store |v_#memory_$Pointer$.offset_110| |v_ULTIMATE.start_sll_insert_~head#1.base_25| (store (select |v_#memory_$Pointer$.offset_110| |v_ULTIMATE.start_sll_insert_~head#1.base_25|) 0 0)) |v_#memory_$Pointer$.offset_53|) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_33| 0) (= (store |v_#memory_int_129| |v_ULTIMATE.start_sll_insert_~head#1.base_25| (store (select |v_#memory_int_129| |v_ULTIMATE.start_sll_insert_~head#1.base_25|) 0 (select (select |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~head#1.base_25|) 0))) |v_#memory_int_53|) (= (store |v_#memory_$Pointer$.base_110| |v_ULTIMATE.start_sll_insert_~head#1.base_25| (store (select |v_#memory_$Pointer$.base_110| |v_ULTIMATE.start_sll_insert_~head#1.base_25|) 0 |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31|)) |v_#memory_$Pointer$.base_53|) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_33| 0))) (<= 2 |v_ULTIMATE.start_sll_insert_~head#1.base_25|) (= (store |v_#memory_$Pointer$.base_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31| (store (select |v_#memory_$Pointer$.base_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31|) 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_31|) 4))) |#memory_$Pointer$.base|))))' at error location [2023-11-12 00:13:01,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:01,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:01,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2023-11-12 00:13:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905809822] [2023-11-12 00:13:01,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:01,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 00:13:01,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:01,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 00:13:01,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1386, Unknown=6, NotChecked=228, Total=1722 [2023-11-12 00:13:01,105 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 26 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 00:13:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:02,682 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2023-11-12 00:13:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:13:02,683 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2023-11-12 00:13:02,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:02,684 INFO L225 Difference]: With dead ends: 31 [2023-11-12 00:13:02,684 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 00:13:02,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=140, Invalid=1935, Unknown=7, NotChecked=270, Total=2352 [2023-11-12 00:13:02,687 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:02,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 149 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:13:02,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 00:13:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-11-12 00:13:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:13:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2023-11-12 00:13:02,699 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 24 [2023-11-12 00:13:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:02,699 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2023-11-12 00:13:02,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 00:13:02,700 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2023-11-12 00:13:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:13:02,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:02,701 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:02,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:02,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:02,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:02,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:02,917 INFO L85 PathProgramCache]: Analyzing trace with hash 416489044, now seen corresponding path program 1 times [2023-11-12 00:13:02,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:02,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239315976] [2023-11-12 00:13:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:02,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:13:03,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:03,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239315976] [2023-11-12 00:13:03,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239315976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:03,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025034088] [2023-11-12 00:13:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:03,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:03,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:03,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:03,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:13:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:04,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-12 00:13:04,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:04,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-12 00:13:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:13:04,463 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-12 00:13:04,695 INFO L322 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-11-12 00:13:04,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 42 [2023-11-12 00:13:04,723 INFO L322 Elim1Store]: treesize reduction 44, result has 25.4 percent of original size [2023-11-12 00:13:04,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 65 [2023-11-12 00:13:04,742 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:13:04,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2023-11-12 00:13:04,785 INFO L351 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 18 treesize of output 12 [2023-11-12 00:13:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:13:04,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:04,871 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:13:04,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 88 [2023-11-12 00:13:04,888 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:13:04,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 82 [2023-11-12 00:13:05,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025034088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855338186] [2023-11-12 00:13:05,756 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-12 00:13:05,756 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:05,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:05,757 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:05,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:07,193 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 38 for LOIs [2023-11-12 00:13:07,229 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:14,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '850#(and (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |ULTIMATE.start_main_~mid_index~0#1| 1) (not (= 5 (select (select |#memory_int| 0) 0))) (= |ULTIMATE.start_main_~uneq~0#1| 5) (exists ((|v_#memory_$Pointer$.base_53| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_38| Int) (|v_#memory_$Pointer$.offset_53| (Array Int (Array Int Int))) (|v_#memory_int_53| (Array Int (Array Int Int))) (|v_#memory_int_149| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_128| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_38| Int) (|v_ULTIMATE.start_sll_insert_~head#1.base_27| Int) (|v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34| Int) (|v_#memory_$Pointer$.offset_124| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34| (store (select |v_#memory_$Pointer$.offset_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34|) 4 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34|) 4)))) (<= 2 |v_ULTIMATE.start_sll_insert_~head#1.base_27|) (= |#memory_int| (store |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34| (store (select |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34|) 4 (select (select |#memory_int| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34|) 4)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34| (store (select |v_#memory_$Pointer$.base_53| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34|) 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34|) 4)))) (or (and (or (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_38| 0)) (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_38| 0))) (= (store |v_#memory_$Pointer$.offset_124| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_38| (store (select |v_#memory_$Pointer$.offset_124| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_38|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_38| 4) 0)) |v_#memory_$Pointer$.offset_53|) (= |v_#memory_int_53| (store |v_#memory_int_149| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_38| (store (select |v_#memory_int_149| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_38|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_38| 4) (select (select |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_38|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_38| 4))))) (= (store |v_#memory_$Pointer$.base_128| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_38| (store (select |v_#memory_$Pointer$.base_128| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_38|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_38| 4) |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34|)) |v_#memory_$Pointer$.base_53|)) (and (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_38| 0) (= (store |v_#memory_$Pointer$.base_128| |v_ULTIMATE.start_sll_insert_~head#1.base_27| (store (select |v_#memory_$Pointer$.base_128| |v_ULTIMATE.start_sll_insert_~head#1.base_27|) 0 |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_34|)) |v_#memory_$Pointer$.base_53|) (= (store |v_#memory_int_149| |v_ULTIMATE.start_sll_insert_~head#1.base_27| (store (select |v_#memory_int_149| |v_ULTIMATE.start_sll_insert_~head#1.base_27|) 0 (select (select |v_#memory_int_53| |v_ULTIMATE.start_sll_insert_~head#1.base_27|) 0))) |v_#memory_int_53|) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_38| 0) (= (store |v_#memory_$Pointer$.offset_124| |v_ULTIMATE.start_sll_insert_~head#1.base_27| (store (select |v_#memory_$Pointer$.offset_124| |v_ULTIMATE.start_sll_insert_~head#1.base_27|) 0 0)) |v_#memory_$Pointer$.offset_53|))))) (= |ULTIMATE.start_main_~ptr~0#1.offset| 0) (= |ULTIMATE.start_main_~count~0#1| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-12 00:13:14,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:14,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:14,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-11-12 00:13:14,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374454588] [2023-11-12 00:13:14,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:14,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 00:13:14,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:14,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 00:13:14,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1681, Unknown=1, NotChecked=0, Total=1806 [2023-11-12 00:13:14,105 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 00:13:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:15,806 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2023-11-12 00:13:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:13:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2023-11-12 00:13:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:15,808 INFO L225 Difference]: With dead ends: 32 [2023-11-12 00:13:15,808 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:13:15,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=201, Invalid=2450, Unknown=1, NotChecked=0, Total=2652 [2023-11-12 00:13:15,812 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:15,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 211 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:13:15,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:13:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-12 00:13:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:13:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2023-11-12 00:13:15,827 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 24 [2023-11-12 00:13:15,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:15,827 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-11-12 00:13:15,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 00:13:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2023-11-12 00:13:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 00:13:15,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:15,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:15,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:16,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:16,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:16,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:16,039 INFO L85 PathProgramCache]: Analyzing trace with hash -74239484, now seen corresponding path program 3 times [2023-11-12 00:13:16,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:16,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808110268] [2023-11-12 00:13:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:16,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:13:16,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808110268] [2023-11-12 00:13:16,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808110268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47649606] [2023-11-12 00:13:16,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:13:16,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:16,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:16,251 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:16,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:13:16,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:13:16,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:13:16,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 00:13:16,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:13:17,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:13:17,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47649606] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:17,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:17,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 11 [2023-11-12 00:13:17,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422105006] [2023-11-12 00:13:17,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:13:17,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:13:17,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:13:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:13:17,130 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:13:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:17,202 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2023-11-12 00:13:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:13:17,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-11-12 00:13:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:17,205 INFO L225 Difference]: With dead ends: 34 [2023-11-12 00:13:17,205 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 00:13:17,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:13:17,207 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:17,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 51 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:13:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 00:13:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-12 00:13:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:13:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-12 00:13:17,217 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 25 [2023-11-12 00:13:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:17,218 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-12 00:13:17,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:13:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-12 00:13:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 00:13:17,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:17,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:17,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 00:13:17,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:17,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:17,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:17,421 INFO L85 PathProgramCache]: Analyzing trace with hash 738028294, now seen corresponding path program 1 times [2023-11-12 00:13:17,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:17,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450798639] [2023-11-12 00:13:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:17,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:13:17,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:17,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450798639] [2023-11-12 00:13:17,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450798639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:17,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561567068] [2023-11-12 00:13:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:17,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:17,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:17,789 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:17,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:13:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:17,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:13:17,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:13:18,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:13:18,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561567068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:18,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1409176204] [2023-11-12 00:13:18,134 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-12 00:13:18,134 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:18,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:18,134 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:18,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:19,530 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2023-11-12 00:13:19,686 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:21,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1374#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~mid_index~0#1| 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|) 1)) (= |ULTIMATE.start_main_~uneq~0#1| 5) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (not (= |ULTIMATE.start_main_~count~0#1| 1)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-12 00:13:21,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:21,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:13:21,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2023-11-12 00:13:21,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963435342] [2023-11-12 00:13:21,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:21,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:13:21,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:13:21,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:13:21,557 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:13:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:21,952 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-12 00:13:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:13:21,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 26 [2023-11-12 00:13:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:21,963 INFO L225 Difference]: With dead ends: 34 [2023-11-12 00:13:21,963 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:13:21,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2023-11-12 00:13:21,965 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:21,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 83 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:13:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:13:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-12 00:13:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:13:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-12 00:13:21,978 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 26 [2023-11-12 00:13:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:21,979 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-12 00:13:21,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:13:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-12 00:13:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 00:13:21,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:21,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:21,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:22,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b79968-4e2d-4e48-b06e-e2276da49e6b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:22,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:22,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:22,185 INFO L85 PathProgramCache]: Analyzing trace with hash 738107375, now seen corresponding path program 1 times [2023-11-12 00:13:22,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:22,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221766678] [2023-11-12 00:13:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:22,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat