./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ --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 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:21:43,344 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:21:43,421 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:21:43,427 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:21:43,428 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:21:43,454 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:21:43,455 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:21:43,456 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:21:43,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:21:43,457 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:21:43,458 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:21:43,458 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:21:43,459 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:21:43,459 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:21:43,460 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:21:43,461 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:21:43,461 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:21:43,462 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:21:43,462 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:21:43,463 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:21:43,463 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:21:43,471 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:21:43,472 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:21:43,472 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:21:43,472 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:21:43,473 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:21:43,473 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:21:43,474 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:21:43,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:21:43,475 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:21:43,475 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:21:43,475 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:21:43,476 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:21:43,476 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:21:43,477 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:21:43,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:21:43,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:21:43,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:21:43,478 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:21:43,479 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:21:43,479 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:21:43,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:21:43,487 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:21:43,488 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:21:43,488 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:21:43,488 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_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a [2023-11-19 05:21:43,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:21:43,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:21:43,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:21:43,835 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:21:43,835 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:21:43,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/list-simple/sll2n_update_all.i [2023-11-19 05:21:47,036 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:21:47,383 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:21:47,384 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/sv-benchmarks/c/list-simple/sll2n_update_all.i [2023-11-19 05:21:47,399 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/data/91d62b416/21ec87292e6e4f7594d2afcb57671fe2/FLAGfb1a32a76 [2023-11-19 05:21:47,413 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/data/91d62b416/21ec87292e6e4f7594d2afcb57671fe2 [2023-11-19 05:21:47,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:21:47,418 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:21:47,422 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:21:47,422 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:21:47,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:21:47,430 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:21:47" (1/1) ... [2023-11-19 05:21:47,432 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4596f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:47, skipping insertion in model container [2023-11-19 05:21:47,432 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:21:47" (1/1) ... [2023-11-19 05:21:47,500 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:21:47,885 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_c03a7ad3-1897-44f8-be82-17929cf43f97/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2023-11-19 05:21:47,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:21:47,901 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:21:47,970 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_c03a7ad3-1897-44f8-be82-17929cf43f97/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2023-11-19 05:21:47,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:21:48,005 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:21:48,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48 WrapperNode [2023-11-19 05:21:48,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:21:48,006 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:21:48,007 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:21:48,007 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:21:48,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,085 INFO L138 Inliner]: procedures = 126, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 121 [2023-11-19 05:21:48,090 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:21:48,091 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:21:48,091 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:21:48,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:21:48,105 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,127 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,127 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,133 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,137 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,140 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:21:48,150 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:21:48,152 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:21:48,152 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:21:48,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (1/1) ... [2023-11-19 05:21:48,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:21:48,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:48,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:21:48,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:21:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:21:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:21:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:21:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:21:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:21:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:21:48,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:21:48,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:21:48,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:21:48,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:21:48,382 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:21:48,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:21:48,618 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:21:48,695 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:21:48,695 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 05:21:48,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:21:48 BoogieIcfgContainer [2023-11-19 05:21:48,700 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:21:48,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:21:48,702 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:21:48,706 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:21:48,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:21:47" (1/3) ... [2023-11-19 05:21:48,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c038419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:21:48, skipping insertion in model container [2023-11-19 05:21:48,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:21:48" (2/3) ... [2023-11-19 05:21:48,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c038419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:21:48, skipping insertion in model container [2023-11-19 05:21:48,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:21:48" (3/3) ... [2023-11-19 05:21:48,709 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_update_all.i [2023-11-19 05:21:48,726 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:21:48,726 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:21:48,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:21:48,778 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;@6b04a503, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:21:48,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:21:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 05:21:48,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:48,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:48,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:48,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:48,796 INFO L85 PathProgramCache]: Analyzing trace with hash 188652621, now seen corresponding path program 1 times [2023-11-19 05:21:48,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:48,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98386338] [2023-11-19 05:21:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:21:49,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:49,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98386338] [2023-11-19 05:21:49,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98386338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:49,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:49,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:21:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054934986] [2023-11-19 05:21:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:49,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:21:49,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:49,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:21:49,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:49,196 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:49,270 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2023-11-19 05:21:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:21:49,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 05:21:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:49,278 INFO L225 Difference]: With dead ends: 27 [2023-11-19 05:21:49,278 INFO L226 Difference]: Without dead ends: 12 [2023-11-19 05:21:49,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:21:49,284 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:49,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:21:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-19 05:21:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2023-11-19 05:21:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2023-11-19 05:21:49,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2023-11-19 05:21:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:49,314 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2023-11-19 05:21:49,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2023-11-19 05:21:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 05:21:49,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:49,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:49,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:21:49,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:49,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:49,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1236248315, now seen corresponding path program 1 times [2023-11-19 05:21:49,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:49,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868718732] [2023-11-19 05:21:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:49,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:21:49,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:49,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868718732] [2023-11-19 05:21:49,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868718732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:49,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:49,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:21:49,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953350992] [2023-11-19 05:21:49,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:49,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:21:49,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:49,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:21:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:21:49,459 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:49,500 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2023-11-19 05:21:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:21:49,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 05:21:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:49,501 INFO L225 Difference]: With dead ends: 23 [2023-11-19 05:21:49,501 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 05:21:49,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:21:49,504 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:49,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:21:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 05:21:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2023-11-19 05:21:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-11-19 05:21:49,510 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2023-11-19 05:21:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:49,511 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-11-19 05:21:49,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-11-19 05:21:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 05:21:49,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:49,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:49,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:21:49,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:49,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:49,513 INFO L85 PathProgramCache]: Analyzing trace with hash -660348294, now seen corresponding path program 1 times [2023-11-19 05:21:49,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:49,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361857952] [2023-11-19 05:21:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:49,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:21:49,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:49,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361857952] [2023-11-19 05:21:49,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361857952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:49,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631542609] [2023-11-19 05:21:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:49,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:49,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:49,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:49,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:21:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:49,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:21:49,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:21:49,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:21:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:21:50,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631542609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:21:50,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894360117] [2023-11-19 05:21:50,054 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:21:50,054 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:21:50,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:21:50,064 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:21:50,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:21:52,311 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:21:53,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [894360117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:53,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:21:53,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 3, 3] total 10 [2023-11-19 05:21:53,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201600501] [2023-11-19 05:21:53,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:53,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:21:53,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:21:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:21:53,304 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:53,441 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2023-11-19 05:21:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:21:53,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 05:21:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:53,442 INFO L225 Difference]: With dead ends: 19 [2023-11-19 05:21:53,443 INFO L226 Difference]: Without dead ends: 14 [2023-11-19 05:21:53,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:21:53,445 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:53,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:21:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-19 05:21:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-11-19 05:21:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2023-11-19 05:21:53,457 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 11 [2023-11-19 05:21:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:53,458 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2023-11-19 05:21:53,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2023-11-19 05:21:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 05:21:53,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:53,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:53,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:53,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 05:21:53,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:53,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:53,661 INFO L85 PathProgramCache]: Analyzing trace with hash 384828029, now seen corresponding path program 1 times [2023-11-19 05:21:53,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:53,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865876230] [2023-11-19 05:21:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:53,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:21:53,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:53,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865876230] [2023-11-19 05:21:53,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865876230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:53,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:53,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:21:53,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454714739] [2023-11-19 05:21:53,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:53,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:21:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:53,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:21:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:21:53,767 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:53,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:53,831 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2023-11-19 05:21:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:21:53,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 05:21:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:53,832 INFO L225 Difference]: With dead ends: 27 [2023-11-19 05:21:53,832 INFO L226 Difference]: Without dead ends: 20 [2023-11-19 05:21:53,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:21:53,836 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:53,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:21:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-19 05:21:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2023-11-19 05:21:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2023-11-19 05:21:53,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 12 [2023-11-19 05:21:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:53,852 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2023-11-19 05:21:53,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2023-11-19 05:21:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:21:53,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:53,854 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:53,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:21:53,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:53,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:53,855 INFO L85 PathProgramCache]: Analyzing trace with hash -829971810, now seen corresponding path program 2 times [2023-11-19 05:21:53,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:53,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469521437] [2023-11-19 05:21:53,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:53,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:21:53,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:53,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469521437] [2023-11-19 05:21:53,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469521437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:53,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599748738] [2023-11-19 05:21:53,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:21:53,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:53,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:53,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:53,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:21:54,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:21:54,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:21:54,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:21:54,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:21:54,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:21:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:21:54,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599748738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:21:54,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [586415528] [2023-11-19 05:21:54,146 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:21:54,146 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:21:54,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:21:54,147 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:21:54,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:21:55,331 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:21:56,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '413#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (exists ((|v_ULTIMATE.start_main_~new_data~0#1_23| Int) (|v_ULTIMATE.start_main_~i~0#1_56| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~new_data~0#1_23| 3) (= |ULTIMATE.start_node_create_#res#1.offset| 0) (= |v_ULTIMATE.start_main_~i~0#1_56| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_#memory_int_73| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_63| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_63| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_~head#1.base_34| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_34| Int)) (and (= |#memory_int| (store |v_#memory_int_73| |v_ULTIMATE.start_sll_update_at_~head#1.base_34| (store (select |v_#memory_int_73| |v_ULTIMATE.start_sll_update_at_~head#1.base_34|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_34| (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_34|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_34|)))) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_34|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_34|)) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_63| |v_ULTIMATE.start_sll_update_at_~head#1.base_34| (store (select |v_#memory_$Pointer$.offset_63| |v_ULTIMATE.start_sll_update_at_~head#1.base_34|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_34| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_34|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_34|)))) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_34|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_34|) 3) (= (store |v_#memory_$Pointer$.base_63| |v_ULTIMATE.start_sll_update_at_~head#1.base_34| (store (select |v_#memory_$Pointer$.base_63| |v_ULTIMATE.start_sll_update_at_~head#1.base_34|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_34| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_34|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_34|))) |#memory_$Pointer$.base|))) (= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_23|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2023-11-19 05:21:56,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:21:56,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:21:56,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-19 05:21:56,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898376307] [2023-11-19 05:21:56,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:21:56,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:21:56,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:21:56,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:21:56,925 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:56,973 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2023-11-19 05:21:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:21:56,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 05:21:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:56,974 INFO L225 Difference]: With dead ends: 28 [2023-11-19 05:21:56,974 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 05:21:56,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:21:56,976 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:56,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:21:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 05:21:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 05:21:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-19 05:21:56,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2023-11-19 05:21:56,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:56,984 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-19 05:21:56,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:21:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-19 05:21:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:21:56,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:56,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:57,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:21:57,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:57,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:57,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:57,191 INFO L85 PathProgramCache]: Analyzing trace with hash 96720944, now seen corresponding path program 3 times [2023-11-19 05:21:57,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:57,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066501924] [2023-11-19 05:21:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:21:58,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:58,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066501924] [2023-11-19 05:21:58,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066501924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:58,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79150704] [2023-11-19 05:21:58,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:21:58,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:58,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:58,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:58,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:21:58,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:21:58,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:21:58,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-19 05:21:58,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:21:58,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:21:58,716 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 05:21:58,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 05:21:58,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 05:21:58,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-19 05:21:58,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 05:21:58,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-19 05:21:58,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 05:21:59,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 05:21:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:21:59,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:21:59,049 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_252 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_252) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2023-11-19 05:21:59,056 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_252 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_252) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2023-11-19 05:21:59,071 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_252 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_252) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2023-11-19 05:21:59,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:21:59,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-11-19 05:21:59,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:21:59,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 51 [2023-11-19 05:21:59,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-19 05:21:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-19 05:21:59,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79150704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:21:59,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154617267] [2023-11-19 05:21:59,349 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:21:59,349 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:21:59,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:21:59,350 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:21:59,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:22:01,464 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:22:01,984 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_#memory_$Pointer$.base_82| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_~head#1.base_51| Int) (|v_#memory_$Pointer$.offset_80| (Array Int (Array Int Int))) (|v_#memory_int_92| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_49| Int)) (and (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_update_at_~head#1.base_51| (store (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49|)))) (= (store |v_#memory_int_92| |v_ULTIMATE.start_sll_update_at_~head#1.base_51| (store (select |v_#memory_int_92| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49| (select (select |c_#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49|))) |c_#memory_int|) (= (store |v_#memory_$Pointer$.offset_80| |v_ULTIMATE.start_sll_update_at_~head#1.base_51| (store (select |v_#memory_$Pointer$.offset_80| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49| (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49|))) |c_#memory_$Pointer$.offset|))) (and (= |c_ULTIMATE.start_sll_create_#res#1.base| |c_ULTIMATE.start_main_~s~0#1.base|) (= |c_ULTIMATE.start_sll_create_#res#1.offset| |c_ULTIMATE.start_main_~s~0#1.offset|) (= |c_ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_sll_create_#in~len#1_14| Int) (|v_ULTIMATE.start_sll_create_~new_head~0#1.offset_32| Int) (|v_ULTIMATE.start_sll_create_~data#1_16| Int) (|v_ULTIMATE.start_sll_create_#in~data#1_14| Int)) (let ((.cse0 (= |c_ULTIMATE.start_node_create_#res#1.offset| 0)) (.cse7 (= 0 |v_ULTIMATE.start_sll_create_~new_head~0#1.offset_32|)) (.cse1 (= |v_ULTIMATE.start_sll_create_~data#1_16| 1)) (.cse3 (= |c_ULTIMATE.start_sll_create_#res#1.offset| 0)) (.cse4 (= |v_ULTIMATE.start_sll_create_#in~data#1_14| 1)) (.cse5 (= |c_ULTIMATE.start_main_~data~0#1| 1)) (.cse6 (= 2 |v_ULTIMATE.start_sll_create_#in~len#1_14|)) (.cse8 (= |c_ULTIMATE.start_main_~len~0#1| 2))) (and (let ((.cse2 (<= 1 |c_#StackHeapBarrier|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse8))) (or (and .cse0 .cse1 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse1 .cse3 .cse4 .cse5 .cse6 .cse8))))))) is different from true [2023-11-19 05:22:08,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '618#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_67| Int)) (and (<= |ULTIMATE.start_main_~len~0#1| |v_ULTIMATE.start_main_~i~0#1_67|) (exists ((|v_#memory_$Pointer$.base_82| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_~head#1.base_51| Int) (|v_#memory_$Pointer$.offset_80| (Array Int (Array Int Int))) (|v_#memory_int_92| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_49| Int)) (and (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_update_at_~head#1.base_51| (store (select |v_#memory_$Pointer$.base_82| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49|)))) (= |#memory_int| (store |v_#memory_int_92| |v_ULTIMATE.start_sll_update_at_~head#1.base_51| (store (select |v_#memory_int_92| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49| (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49|)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_80| |v_ULTIMATE.start_sll_update_at_~head#1.base_51| (store (select |v_#memory_$Pointer$.offset_80| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_51|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_49|)))))))) (<= 1 |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2023-11-19 05:22:08,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:22:08,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:22:08,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-19 05:22:08,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629002147] [2023-11-19 05:22:08,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:22:08,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-19 05:22:08,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-19 05:22:08,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1084, Unknown=12, NotChecked=276, Total=1482 [2023-11-19 05:22:08,622 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:09,292 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2023-11-19 05:22:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 05:22:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 05:22:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:09,293 INFO L225 Difference]: With dead ends: 38 [2023-11-19 05:22:09,293 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 05:22:09,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=180, Invalid=1543, Unknown=15, NotChecked=332, Total=2070 [2023-11-19 05:22:09,295 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:09,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 75 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 370 Invalid, 0 Unknown, 116 Unchecked, 0.4s Time] [2023-11-19 05:22:09,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 05:22:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2023-11-19 05:22:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2023-11-19 05:22:09,307 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 16 [2023-11-19 05:22:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:09,308 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2023-11-19 05:22:09,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2023-11-19 05:22:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 05:22:09,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:09,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:09,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:09,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:22:09,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:22:09,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1298270598, now seen corresponding path program 1 times [2023-11-19 05:22:09,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:09,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854272280] [2023-11-19 05:22:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:09,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:22:09,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:09,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854272280] [2023-11-19 05:22:09,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854272280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:22:09,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:22:09,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:22:09,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031895471] [2023-11-19 05:22:09,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:22:09,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:22:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:09,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:22:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:22:09,625 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:09,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:09,688 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-11-19 05:22:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:22:09,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 05:22:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:09,692 INFO L225 Difference]: With dead ends: 35 [2023-11-19 05:22:09,692 INFO L226 Difference]: Without dead ends: 30 [2023-11-19 05:22:09,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:22:09,694 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:09,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:22:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-19 05:22:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-11-19 05:22:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-11-19 05:22:09,712 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2023-11-19 05:22:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:09,712 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-11-19 05:22:09,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-11-19 05:22:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 05:22:09,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:09,714 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:09,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:22:09,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:22:09,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:09,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1915829369, now seen corresponding path program 4 times [2023-11-19 05:22:09,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:09,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885979167] [2023-11-19 05:22:09,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:09,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:22:09,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:09,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885979167] [2023-11-19 05:22:09,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885979167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:22:09,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257581806] [2023-11-19 05:22:09,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:22:09,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:09,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:09,867 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:09,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:22:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:10,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:22:10,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:22:10,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:22:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:22:10,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257581806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:22:10,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325922162] [2023-11-19 05:22:10,071 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:22:10,071 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:22:10,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:22:10,072 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:22:10,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:22:11,124 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:22:16,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '958#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_78| Int) (|v_ULTIMATE.start_main_~new_data~0#1_38| Int)) (and (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_38|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_node_create_#res#1.offset| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |v_ULTIMATE.start_main_~i~0#1_78| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_62| Int) (|v_#memory_int_108| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_96| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_98| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_~head#1.base_64| Int)) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_96| |v_ULTIMATE.start_sll_update_at_~head#1.base_64| (store (select |v_#memory_$Pointer$.offset_96| |v_ULTIMATE.start_sll_update_at_~head#1.base_64|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_62| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_64|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_62|)))) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_64|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_62|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_64|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_62|) 3) (= |#memory_int| (store |v_#memory_int_108| |v_ULTIMATE.start_sll_update_at_~head#1.base_64| (store (select |v_#memory_int_108| |v_ULTIMATE.start_sll_update_at_~head#1.base_64|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_62| (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_64|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_62|)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_98| |v_ULTIMATE.start_sll_update_at_~head#1.base_64| (store (select |v_#memory_$Pointer$.base_98| |v_ULTIMATE.start_sll_update_at_~head#1.base_64|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_62| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_64|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_62|)))))) (<= |v_ULTIMATE.start_main_~new_data~0#1_38| 3) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2023-11-19 05:22:16,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:22:16,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:22:16,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-11-19 05:22:16,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591129099] [2023-11-19 05:22:16,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:22:16,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:22:16,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:22:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=188, Unknown=2, NotChecked=0, Total=240 [2023-11-19 05:22:16,443 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:16,547 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2023-11-19 05:22:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:22:16,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 05:22:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:16,548 INFO L225 Difference]: With dead ends: 46 [2023-11-19 05:22:16,548 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 05:22:16,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=64, Invalid=240, Unknown=2, NotChecked=0, Total=306 [2023-11-19 05:22:16,550 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:16,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:22:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 05:22:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2023-11-19 05:22:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2023-11-19 05:22:16,562 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 17 [2023-11-19 05:22:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:16,563 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2023-11-19 05:22:16,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2023-11-19 05:22:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:22:16,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:16,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:16,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:16,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 05:22:16,775 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:22:16,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:16,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1471993745, now seen corresponding path program 5 times [2023-11-19 05:22:16,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:16,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066634512] [2023-11-19 05:22:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:16,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:22:16,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066634512] [2023-11-19 05:22:16,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066634512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:22:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686454362] [2023-11-19 05:22:16,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:22:16,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:16,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:16,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:16,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:22:17,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 05:22:17,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:22:17,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:22:17,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:22:17,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:22:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:22:17,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686454362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:22:17,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [531446276] [2023-11-19 05:22:17,216 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:22:17,216 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:22:17,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:22:17,217 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:22:17,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:22:20,764 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:22:28,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1208#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_90| Int) (|v_ULTIMATE.start_main_~new_data~0#1_47| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_47|) (= |v_ULTIMATE.start_main_~i~0#1_90| 2) (<= |v_ULTIMATE.start_main_~new_data~0#1_47| 3) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (exists ((|v_ULTIMATE.start_sll_update_at_~head#1.base_77| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_75| Int) (|v_#memory_int_123| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_113| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_111| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_113| |v_ULTIMATE.start_sll_update_at_~head#1.base_77| (store (select |v_#memory_$Pointer$.base_113| |v_ULTIMATE.start_sll_update_at_~head#1.base_77|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_75| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_77|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_75|))) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_111| |v_ULTIMATE.start_sll_update_at_~head#1.base_77| (store (select |v_#memory_$Pointer$.offset_111| |v_ULTIMATE.start_sll_update_at_~head#1.base_77|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_75| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_77|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_75|)))) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_77|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_75|) 3) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_77|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_75|)) (= |#memory_int| (store |v_#memory_int_123| |v_ULTIMATE.start_sll_update_at_~head#1.base_77| (store (select |v_#memory_int_123| |v_ULTIMATE.start_sll_update_at_~head#1.base_77|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_75| (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_77|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_75|)))))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2023-11-19 05:22:28,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:22:28,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:22:28,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-19 05:22:28,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158140095] [2023-11-19 05:22:28,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:22:28,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:22:28,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:28,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:22:28,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=213, Unknown=4, NotChecked=0, Total=272 [2023-11-19 05:22:28,285 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:28,428 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-11-19 05:22:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:22:28,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 05:22:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:28,429 INFO L225 Difference]: With dead ends: 39 [2023-11-19 05:22:28,430 INFO L226 Difference]: Without dead ends: 20 [2023-11-19 05:22:28,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=77, Invalid=299, Unknown=4, NotChecked=0, Total=380 [2023-11-19 05:22:28,431 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:28,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 18 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:22:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-19 05:22:28,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-19 05:22:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-11-19 05:22:28,440 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2023-11-19 05:22:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:28,441 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-11-19 05:22:28,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:28,441 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-11-19 05:22:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:22:28,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:28,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:28,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 05:22:28,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 05:22:28,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:22:28,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash -482800143, now seen corresponding path program 1 times [2023-11-19 05:22:28,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:28,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211313536] [2023-11-19 05:22:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:28,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:22:28,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:28,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211313536] [2023-11-19 05:22:28,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211313536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:22:28,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163991542] [2023-11-19 05:22:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:28,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:28,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:28,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:28,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:22:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:28,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:22:28,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:22:28,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:22:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:22:29,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163991542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:22:29,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792708880] [2023-11-19 05:22:29,008 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:22:29,009 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:22:29,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:22:29,009 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:22:29,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:22:31,849 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:22:36,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1436#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (exists ((|v_ULTIMATE.start_main_~new_data~0#1_52| Int) (|v_ULTIMATE.start_main_~i~0#1_98| Int)) (and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_82| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.base_84| Int) (|v_#memory_int_134| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_124| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_#in~data#1_54| Int) (|v_#memory_$Pointer$.offset_122| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_#in~index#1_54| Int)) (and (= |#memory_int| (store |v_#memory_int_134| |v_ULTIMATE.start_sll_update_at_~head#1.base_84| (store (select |v_#memory_int_134| |v_ULTIMATE.start_sll_update_at_~head#1.base_84|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_82| (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_84|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_82|)))) (<= 2 |v_ULTIMATE.start_sll_update_at_#in~data#1_54|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_122| |v_ULTIMATE.start_sll_update_at_~head#1.base_84| (store (select |v_#memory_$Pointer$.offset_122| |v_ULTIMATE.start_sll_update_at_~head#1.base_84|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_82| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_84|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_82|)))) (= (store |v_#memory_$Pointer$.base_124| |v_ULTIMATE.start_sll_update_at_~head#1.base_84| (store (select |v_#memory_$Pointer$.base_124| |v_ULTIMATE.start_sll_update_at_~head#1.base_84|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_82| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_84|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_82|))) |#memory_$Pointer$.base|) (<= |v_ULTIMATE.start_sll_update_at_#in~data#1_54| 3) (or (= |v_ULTIMATE.start_sll_update_at_~head#1.offset_82| 0) (and (= 3 (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_84|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_82|)) (= |v_ULTIMATE.start_sll_update_at_#in~index#1_54| 1) (= |v_ULTIMATE.start_main_~new_data~0#1_52| 3) (= |v_ULTIMATE.start_sll_update_at_#in~data#1_54| 3))) (<= 0 |v_ULTIMATE.start_sll_update_at_#in~index#1_54|) (<= |v_ULTIMATE.start_sll_update_at_#in~index#1_54| 1) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_84|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_82|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_84|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_82|) 3))) (<= |v_ULTIMATE.start_main_~new_data~0#1_52| 3) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |v_ULTIMATE.start_main_~i~0#1_98| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_52|) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2023-11-19 05:22:36,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:22:36,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:22:36,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-19 05:22:36,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202769608] [2023-11-19 05:22:36,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:22:36,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:22:36,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:22:36,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:22:36,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=143, Unknown=3, NotChecked=0, Total=182 [2023-11-19 05:22:36,810 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:22:36,904 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-11-19 05:22:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:22:36,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 05:22:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:22:36,906 INFO L225 Difference]: With dead ends: 24 [2023-11-19 05:22:36,906 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 05:22:36,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=41, Invalid=166, Unknown=3, NotChecked=0, Total=210 [2023-11-19 05:22:36,907 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:22:36,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:22:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 05:22:36,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-19 05:22:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-19 05:22:36,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-11-19 05:22:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:22:36,916 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-19 05:22:36,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:22:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-19 05:22:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:22:36,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:22:36,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:22:36,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:22:37,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:22:37,139 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:22:37,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:22:37,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2083555111, now seen corresponding path program 1 times [2023-11-19 05:22:37,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:22:37,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963295913] [2023-11-19 05:22:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:37,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:22:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:22:38,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:22:38,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963295913] [2023-11-19 05:22:38,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963295913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:22:38,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729625304] [2023-11-19 05:22:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:22:38,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:22:38,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:22:38,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:22:38,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c03a7ad3-1897-44f8-be82-17929cf43f97/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:22:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:22:38,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-19 05:22:38,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:22:38,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:22:39,059 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 05:22:39,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 05:22:39,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-19 05:22:39,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:22:39,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-19 05:22:39,601 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-19 05:22:39,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2023-11-19 05:22:39,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2023-11-19 05:22:39,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 23 [2023-11-19 05:22:39,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2023-11-19 05:22:39,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 05:22:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:22:39,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:22:40,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2023-11-19 05:22:40,226 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (= |c_ULTIMATE.start_sll_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| 1)) (forall ((v_ArrVal_702 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_702) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (forall ((v_ArrVal_700 (Array Int Int))) (= |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_700) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))))) is different from false [2023-11-19 05:22:40,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:22:40,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2023-11-19 05:22:40,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-19 05:22:40,421 WARN L854 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((v_ArrVal_699 (Array Int Int))) (or (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_699) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (not (= v_ArrVal_699 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_699 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))))))) is different from false [2023-11-19 05:22:40,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-19 05:22:40,671 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:22:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-19 05:22:40,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729625304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:22:40,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712827330] [2023-11-19 05:22:40,821 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:22:40,821 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:22:40,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:22:40,822 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:22:40,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs