./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 e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! 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-e7bb482 [2023-11-06 21:07:37,175 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:07:37,322 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 21:07:37,326 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:07:37,327 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:07:37,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:07:37,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:07:37,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:07:37,374 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:07:37,379 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:07:37,379 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:07:37,380 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:07:37,380 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:07:37,382 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:07:37,382 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:07:37,383 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:07:37,383 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:07:37,384 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:07:37,384 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:07:37,386 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:07:37,386 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:07:37,387 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:07:37,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:07:37,388 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:07:37,389 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:07:37,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:07:37,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:07:37,390 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:07:37,390 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:07:37,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:07:37,392 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:07:37,393 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:07:37,393 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:07:37,393 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:07:37,393 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:07:37,394 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:07:37,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:07:37,394 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:07:37,394 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:07:37,395 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:07:37,395 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:07:37,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:07:37,396 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:07:37,396 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:07:37,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:07:37,397 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_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2023-11-06 21:07:37,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:07:37,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:07:37,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:07:37,764 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:07:37,765 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:07:37,768 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2023-11-06 21:07:40,792 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:07:41,081 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:07:41,082 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2023-11-06 21:07:41,097 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/data/ffaa902d0/332b12cacf79498f8f9e11eff75ff618/FLAG9463bdefb [2023-11-06 21:07:41,111 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/data/ffaa902d0/332b12cacf79498f8f9e11eff75ff618 [2023-11-06 21:07:41,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:07:41,116 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:07:41,117 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:07:41,117 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:07:41,123 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:07:41,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,125 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@595f77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41, skipping insertion in model container [2023-11-06 21:07:41,125 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,167 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:07:41,557 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_389015fe-a9ca-4291-bd4c-dd27711b2770/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2023-11-06 21:07:41,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:07:41,582 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:07:41,637 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_389015fe-a9ca-4291-bd4c-dd27711b2770/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2023-11-06 21:07:41,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:07:41,679 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:07:41,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41 WrapperNode [2023-11-06 21:07:41,680 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:07:41,681 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:07:41,681 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:07:41,682 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:07:41,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,719 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,755 INFO L138 Inliner]: procedures = 128, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2023-11-06 21:07:41,756 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:07:41,757 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:07:41,757 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:07:41,758 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:07:41,768 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,773 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,774 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,783 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,787 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,790 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,796 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:07:41,802 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:07:41,802 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:07:41,802 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:07:41,803 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (1/1) ... [2023-11-06 21:07:41,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:07:41,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:07:41,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:07:41,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:07:41,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:07:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:07:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-06 21:07:41,887 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-06 21:07:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:07:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:07:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:07:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 21:07:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 21:07:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:07:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 21:07:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:07:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:07:41,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:07:42,072 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:07:42,076 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:07:42,473 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:07:42,565 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:07:42,565 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 21:07:42,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:07:42 BoogieIcfgContainer [2023-11-06 21:07:42,568 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:07:42,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:07:42,571 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:07:42,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:07:42,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:07:41" (1/3) ... [2023-11-06 21:07:42,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f781008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:07:42, skipping insertion in model container [2023-11-06 21:07:42,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:41" (2/3) ... [2023-11-06 21:07:42,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f781008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:07:42, skipping insertion in model container [2023-11-06 21:07:42,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:07:42" (3/3) ... [2023-11-06 21:07:42,583 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2023-11-06 21:07:42,606 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:07:42,606 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:07:42,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:07:42,660 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=LoopsAndPotentialCycles, 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;@42bf8c2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:07:42,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:07:42,665 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) [2023-11-06 21:07:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:07:42,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:42,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:42,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:07:42,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1821383254, now seen corresponding path program 1 times [2023-11-06 21:07:42,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:42,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187679006] [2023-11-06 21:07:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:42,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:43,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:43,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187679006] [2023-11-06 21:07:43,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187679006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:43,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:43,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:07:43,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125892817] [2023-11-06 21:07:43,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:43,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:07:43,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:43,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:07:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:07:43,220 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) [2023-11-06 21:07:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:43,304 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-11-06 21:07:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:07:43,307 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 [2023-11-06 21:07:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:43,315 INFO L225 Difference]: With dead ends: 43 [2023-11-06 21:07:43,315 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 21:07:43,319 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 [2023-11-06 21:07:43,325 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:43,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:07:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 21:07:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-11-06 21:07:43,376 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) [2023-11-06 21:07:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2023-11-06 21:07:43,380 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 11 [2023-11-06 21:07:43,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:43,381 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2023-11-06 21:07:43,382 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) [2023-11-06 21:07:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2023-11-06 21:07:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 21:07:43,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:43,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:43,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:07:43,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:07:43,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:43,387 INFO L85 PathProgramCache]: Analyzing trace with hash -239807907, now seen corresponding path program 1 times [2023-11-06 21:07:43,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:43,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306445729] [2023-11-06 21:07:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:43,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:07:43,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:43,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306445729] [2023-11-06 21:07:43,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306445729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:07:43,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336006916] [2023-11-06 21:07:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:43,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:07:43,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:07:43,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:07:43,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:07:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:43,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:07:43,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:07:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:07:43,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:07:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:07:44,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336006916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:07:44,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1678275327] [2023-11-06 21:07:44,059 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-06 21:07:44,060 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:07:44,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:07:44,068 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:07:44,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:07:46,800 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 38 for LOIs [2023-11-06 21:07:46,848 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:07:48,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1678275327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:48,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:07:48,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 4, 4] total 14 [2023-11-06 21:07:48,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332701702] [2023-11-06 21:07:48,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:07:48,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:48,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:07:48,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=146, Unknown=3, NotChecked=0, Total=182 [2023-11-06 21:07:48,033 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) [2023-11-06 21:07:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:48,791 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2023-11-06 21:07:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:07:48,792 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 [2023-11-06 21:07:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:48,793 INFO L225 Difference]: With dead ends: 28 [2023-11-06 21:07:48,793 INFO L226 Difference]: Without dead ends: 20 [2023-11-06 21:07:48,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=33, Invalid=146, Unknown=3, NotChecked=0, Total=182 [2023-11-06 21:07:48,795 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:48,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:07:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-06 21:07:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-06 21:07:48,806 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) [2023-11-06 21:07:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2023-11-06 21:07:48,807 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 17 [2023-11-06 21:07:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:48,808 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2023-11-06 21:07:48,808 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) [2023-11-06 21:07:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2023-11-06 21:07:48,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 21:07:48,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:48,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:48,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:07:49,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:07:49,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:07:49,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1057843026, now seen corresponding path program 1 times [2023-11-06 21:07:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:49,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075591348] [2023-11-06 21:07:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:49,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:07:49,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:49,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075591348] [2023-11-06 21:07:49,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075591348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:07:49,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819681816] [2023-11-06 21:07:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:49,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:07:49,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:07:49,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:07:49,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:07:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:49,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:07:49,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:07:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:07:49,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:07:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:07:49,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819681816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:07:49,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1836571747] [2023-11-06 21:07:49,416 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-06 21:07:49,417 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:07:49,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:07:49,417 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:07:49,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:07:51,531 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2023-11-06 21:07:51,680 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:07:54,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '409#(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 [2023-11-06 21:07:54,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:07:54,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:07:54,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-06 21:07:54,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55428570] [2023-11-06 21:07:54,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:07:54,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:07:54,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:07:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=232, Unknown=1, NotChecked=0, Total=272 [2023-11-06 21:07:54,865 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) [2023-11-06 21:07:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:54,939 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-11-06 21:07:54,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:07:54,940 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 [2023-11-06 21:07:54,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:54,941 INFO L225 Difference]: With dead ends: 38 [2023-11-06 21:07:54,941 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 21:07:54,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=39, Invalid=232, Unknown=1, NotChecked=0, Total=272 [2023-11-06 21:07:54,943 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 [2023-11-06 21:07:54,943 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] [2023-11-06 21:07:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 21:07:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-06 21:07:54,952 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) [2023-11-06 21:07:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-11-06 21:07:54,953 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 18 [2023-11-06 21:07:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:54,954 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-11-06 21:07:54,954 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) [2023-11-06 21:07:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-11-06 21:07:54,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 21:07:54,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:54,956 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:54,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:07:55,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:07:55,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:07:55,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:55,165 INFO L85 PathProgramCache]: Analyzing trace with hash 416409963, now seen corresponding path program 2 times [2023-11-06 21:07:55,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:55,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502272110] [2023-11-06 21:07:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:55,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:07:57,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:57,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502272110] [2023-11-06 21:07:57,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502272110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:07:57,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513269346] [2023-11-06 21:07:57,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:07:57,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:07:57,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:07:57,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:07:57,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389015fe-a9ca-4291-bd4c-dd27711b2770/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:07:57,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:07:57,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:07:57,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 99 conjunts are in the unsatisfiable core [2023-11-06 21:07:57,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:07:58,082 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 [2023-11-06 21:07:58,100 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 [2023-11-06 21:07:58,199 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 [2023-11-06 21:07:58,387 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 [2023-11-06 21:07:58,393 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 [2023-11-06 21:07:58,402 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 [2023-11-06 21:07:58,408 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 [2023-11-06 21:07:58,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:07:58,544 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 [2023-11-06 21:07:58,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:07:58,569 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 [2023-11-06 21:07:58,589 INFO L322 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-06 21:07:58,589 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 [2023-11-06 21:07:58,604 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 [2023-11-06 21:07:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:07:59,052 INFO L322 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2023-11-06 21:07:59,053 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 [2023-11-06 21:07:59,076 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 [2023-11-06 21:07:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:07:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:07:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:07:59,106 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 [2023-11-06 21:07:59,117 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 [2023-11-06 21:07:59,123 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 [2023-11-06 21:07:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:07:59,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:07:59,424 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0)) (.cse0 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0))) (and (or (forall ((v_DerPreprocessor_3 (Array Int Int)) (v_DerPreprocessor_5 (Array Int Int)) (v_ArrVal_384 (Array Int Int)) (v_DerPreprocessor_4 Int) (v_ArrVal_377 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4) v_DerPreprocessor_4)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_377) (select (select (store (store |c_#memory_$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 [2023-11-06 21:07:59,740 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$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 [2023-11-06 21:08:00,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513269346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:00,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155613158] [2023-11-06 21:08:00,352 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-06 21:08:00,352 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:08:00,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:08:00,352 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:08:00,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:08:02,149 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 62 for LOIs [2023-11-06 21:08:02,290 INFO L180 IcfgInterpreter]: Interpretation finished