./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire --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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:39,276 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:39,388 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:33:39,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:39,395 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:39,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:39,439 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:39,439 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:39,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:39,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:39,446 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:39,448 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:39,448 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:39,450 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:33:39,451 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:39,451 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:39,452 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:33:39,452 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:33:39,453 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:39,453 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:33:39,454 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:33:39,455 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:33:39,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:39,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:39,457 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:33:39,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:33:39,458 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:33:39,458 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:39,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:39,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:39,461 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:39,461 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:33:39,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:39,462 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:39,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:39,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:39,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:39,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:39,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:39,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:39,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:39,465 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:33:39,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:33:39,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:39,466 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:39,467 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:39,467 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:39,467 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_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2023-11-23 20:33:39,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:39,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:39,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:39,836 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:39,837 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:39,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2023-11-23 20:33:42,945 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:43,203 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:43,203 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2023-11-23 20:33:43,220 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/data/7b9d3f35e/5916d3dc2ebd436086985f34cb66322d/FLAGcd3cbb03e [2023-11-23 20:33:43,236 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/data/7b9d3f35e/5916d3dc2ebd436086985f34cb66322d [2023-11-23 20:33:43,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:43,240 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:43,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:43,248 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:43,253 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:43,254 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:43,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f792143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43, skipping insertion in model container [2023-11-23 20:33:43,256 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:43,328 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:43,774 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_5f5f5531-66c7-4353-81e7-fa98813ec387/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2023-11-23 20:33:43,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:43,796 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:43,859 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_5f5f5531-66c7-4353-81e7-fa98813ec387/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2023-11-23 20:33:43,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:43,902 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:43,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43 WrapperNode [2023-11-23 20:33:43,903 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:43,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:43,905 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:43,905 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:43,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:43,949 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:43,990 INFO L138 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 121 [2023-11-23 20:33:43,991 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:43,991 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:43,992 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:43,992 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:44,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:44,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:44,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:44,016 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:44,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:44,039 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:44,041 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:44,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:44,052 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:44,053 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:44,053 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:44,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:44,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (1/1) ... [2023-11-23 20:33:44,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:44,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:44,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:44,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:44,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:33:44,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:33:44,134 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-23 20:33:44,135 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-23 20:33:44,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:33:44,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:33:44,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:33:44,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:33:44,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:33:44,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:33:44,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:33:44,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:33:44,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:44,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:44,296 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:44,299 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:44,578 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:44,685 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:44,685 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 20:33:44,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:44 BoogieIcfgContainer [2023-11-23 20:33:44,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:44,690 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:44,691 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:44,694 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:44,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:43" (1/3) ... [2023-11-23 20:33:44,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0f1df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:44, skipping insertion in model container [2023-11-23 20:33:44,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:43" (2/3) ... [2023-11-23 20:33:44,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0f1df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:44, skipping insertion in model container [2023-11-23 20:33:44,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:44" (3/3) ... [2023-11-23 20:33:44,698 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2023-11-23 20:33:44,718 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:44,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:33:44,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:44,785 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;@7ca2ea42, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:44,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:33:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:44,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 20:33:44,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:44,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:44,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:44,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2008248792, now seen corresponding path program 1 times [2023-11-23 20:33:44,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:44,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122164761] [2023-11-23 20:33:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:44,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:45,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122164761] [2023-11-23 20:33:45,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122164761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:45,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:45,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:45,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808642075] [2023-11-23 20:33:45,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:45,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:45,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:45,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:45,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:45,348 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:33:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:45,430 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2023-11-23 20:33:45,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:45,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-23 20:33:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:45,441 INFO L225 Difference]: With dead ends: 37 [2023-11-23 20:33:45,441 INFO L226 Difference]: Without dead ends: 18 [2023-11-23 20:33:45,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:45,449 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:45,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-23 20:33:45,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2023-11-23 20:33:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-23 20:33:45,493 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2023-11-23 20:33:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:45,494 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-23 20:33:45,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:33:45,495 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-23 20:33:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:33:45,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:45,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:45,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:33:45,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:45,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:45,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1612553850, now seen corresponding path program 1 times [2023-11-23 20:33:45,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:45,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63713076] [2023-11-23 20:33:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:45,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:33:45,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:45,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63713076] [2023-11-23 20:33:45,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63713076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:45,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793135654] [2023-11-23 20:33:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:45,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:45,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:45,760 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:45,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:45,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:33:45,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:45,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:33:46,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793135654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:46,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353387282] [2023-11-23 20:33:46,024 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-23 20:33:46,024 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:33:46,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:33:46,033 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:33:46,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:33:48,278 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 137 for LOIs [2023-11-23 20:33:48,646 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:33:53,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [353387282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:53,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:33:53,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 4, 4] total 14 [2023-11-23 20:33:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865079396] [2023-11-23 20:33:53,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:53,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 20:33:53,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:53,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 20:33:53,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:33:53,015 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:55,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:33:57,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:33:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:58,399 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2023-11-23 20:33:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:33:58,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-23 20:33:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:58,403 INFO L225 Difference]: With dead ends: 22 [2023-11-23 20:33:58,403 INFO L226 Difference]: Without dead ends: 17 [2023-11-23 20:33:58,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:33:58,405 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:58,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2023-11-23 20:33:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-23 20:33:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-23 20:33:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-23 20:33:58,417 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 17 [2023-11-23 20:33:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:58,417 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-23 20:33:58,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-23 20:33:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 20:33:58,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:58,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:58,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:58,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:58,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:58,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:58,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1474735693, now seen corresponding path program 1 times [2023-11-23 20:33:58,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:58,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028533741] [2023-11-23 20:33:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:58,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:33:58,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:58,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028533741] [2023-11-23 20:33:58,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028533741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:58,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988956576] [2023-11-23 20:33:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:58,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:58,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:58,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:58,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:33:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:59,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:33:59,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:33:59,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:33:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988956576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285705768] [2023-11-23 20:33:59,058 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-23 20:33:59,058 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:33:59,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:33:59,059 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:33:59,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:00,712 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 137 for LOIs [2023-11-23 20:34:01,008 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:07,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '372#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|) 1)) (exists ((|v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| Int) (|v_#memory_int_95| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| Int) (|v_#memory_$Pointer$.base_88| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~head#1.base_21| Int) (|v_#memory_$Pointer$.offset_88| (Array Int (Array Int Int))) (|v_#memory_int_46| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| Int) (|v_#memory_$Pointer$.offset_48| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_48| (Array Int (Array Int Int)))) (and (<= 2 |v_ULTIMATE.start_sll_insert_~head#1.base_21|) (= |#memory_int| (store |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| (store (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4 (select (select |#memory_int| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4)))) (or (and (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 0) (= (store |v_#memory_$Pointer$.base_88| |v_ULTIMATE.start_sll_insert_~head#1.base_21| (store (select |v_#memory_$Pointer$.base_88| |v_ULTIMATE.start_sll_insert_~head#1.base_21|) 0 |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|)) |v_#memory_$Pointer$.base_48|) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| 0) (= (store |v_#memory_int_95| |v_ULTIMATE.start_sll_insert_~head#1.base_21| (store (select |v_#memory_int_95| |v_ULTIMATE.start_sll_insert_~head#1.base_21|) 0 (select (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~head#1.base_21|) 0))) |v_#memory_int_46|) (= (store |v_#memory_$Pointer$.offset_88| |v_ULTIMATE.start_sll_insert_~head#1.base_21| (store (select |v_#memory_$Pointer$.offset_88| |v_ULTIMATE.start_sll_insert_~head#1.base_21|) 0 0)) |v_#memory_$Pointer$.offset_48|)) (and (= (store |v_#memory_$Pointer$.base_88| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_$Pointer$.base_88| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 4) |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|)) |v_#memory_$Pointer$.base_48|) (= (store |v_#memory_int_95| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_int_95| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 4) (select (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 4)))) |v_#memory_int_46|) (= (store |v_#memory_$Pointer$.offset_88| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| (store (select |v_#memory_$Pointer$.offset_88| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 4) 0)) |v_#memory_$Pointer$.offset_48|) (or (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_27| 0)) (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_27| 0))))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.offset_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4)))) (= (store |v_#memory_$Pointer$.base_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26| (store (select |v_#memory_$Pointer$.base_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_26|) 4))) |#memory_$Pointer$.base|))) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-23 20:34:07,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:34:07,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:07,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-23 20:34:07,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359029824] [2023-11-23 20:34:07,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:07,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:34:07,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:07,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:34:07,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:34:07,557 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 20:34:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:07,630 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-11-23 20:34:07,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:34:07,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2023-11-23 20:34:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:07,632 INFO L225 Difference]: With dead ends: 32 [2023-11-23 20:34:07,632 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 20:34:07,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:34:07,634 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:07,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 20:34:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-23 20:34:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:34:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-23 20:34:07,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 18 [2023-11-23 20:34:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:07,646 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-23 20:34:07,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 20:34:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-23 20:34:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 20:34:07,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:07,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:07,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:07,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:07,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:07,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash 334061279, now seen corresponding path program 2 times [2023-11-23 20:34:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:07,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439898827] [2023-11-23 20:34:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:34:10,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439898827] [2023-11-23 20:34:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439898827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:10,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243431365] [2023-11-23 20:34:10,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:34:10,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:10,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:10,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:34:10,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 20:34:10,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:34:10,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 99 conjunts are in the unsatisfiable core [2023-11-23 20:34:10,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:10,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:34:10,949 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 11 treesize of output 7 [2023-11-23 20:34:11,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 20:34:11,375 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 38 treesize of output 22 [2023-11-23 20:34:11,381 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 7 treesize of output 3 [2023-11-23 20:34:11,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 20:34:11,394 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 7 treesize of output 3 [2023-11-23 20:34:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:11,536 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 46 treesize of output 35 [2023-11-23 20:34:11,554 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-23 20:34:11,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-23 20:34:11,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-23 20:34:11,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:11,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 20:34:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:11,979 INFO L349 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2023-11-23 20:34:11,980 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 77 [2023-11-23 20:34:11,989 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 92 treesize of output 52 [2023-11-23 20:34:12,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:12,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:12,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:12,019 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 [2023-11-23 20:34:12,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 20:34:12,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 20:34:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:34:12,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:12,263 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0)) (.cse0 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0))) (and (or (forall ((v_ArrVal_380 (Array Int Int)) (v_DerPreprocessor_7 (Array Int Int)) (v_ArrVal_382 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_DerPreprocessor_8 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_7) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_383) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_6) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_8) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (not .cse0) (not .cse1)) (or (forall ((v_DerPreprocessor_3 (Array Int Int)) (v_ArrVal_380 (Array Int Int)) (v_DerPreprocessor_5 (Array Int Int)) (v_ArrVal_382 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4) v_DerPreprocessor_4)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_383) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_DerPreprocessor_3) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_DerPreprocessor_5) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (and .cse1 .cse0)))) is different from false [2023-11-23 20:34:12,590 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|)) (.cse3 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|))) (let ((.cse0 (= .cse3 0)) (.cse1 (= .cse2 0))) (and (or (not .cse0) (not .cse1) (forall ((v_ArrVal_380 (Array Int Int)) (v_DerPreprocessor_7 (Array Int Int)) (v_ArrVal_382 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_DerPreprocessor_8 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_7) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_383) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_6) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_8) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (forall ((v_DerPreprocessor_3 (Array Int Int)) (v_ArrVal_380 (Array Int Int)) (v_DerPreprocessor_5 (Array Int Int)) (v_ArrVal_382 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| .cse2 (store (select |c_#memory_int| .cse2) (+ .cse3 4) v_DerPreprocessor_4)) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_383) (select (select (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_3) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 v_DerPreprocessor_5) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (and .cse0 .cse1))))) is different from false [2023-11-23 20:34:13,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243431365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:13,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [832470731] [2023-11-23 20:34:13,168 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-23 20:34:13,168 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:34:13,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:34:13,169 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:34:13,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:14,577 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 137 for LOIs [2023-11-23 20:34:14,836 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:24,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '586#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|) 1)) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_106| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~head#1.base_23| Int) (|v_#memory_int_46| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_106| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29| Int) (|v_#memory_$Pointer$.offset_48| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| Int) (|v_#memory_int_123| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| Int) (|v_#memory_$Pointer$.base_48| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29| (store (select |v_#memory_$Pointer$.offset_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4)))) (= |#memory_int| (store |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29| (store (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4 (select (select |#memory_int| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4)))) (= (store |v_#memory_$Pointer$.base_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29| (store (select |v_#memory_$Pointer$.base_48| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|) 4))) |#memory_$Pointer$.base|) (<= 2 |v_ULTIMATE.start_sll_insert_~head#1.base_23|) (or (and (= |v_#memory_int_46| (store |v_#memory_int_123| |v_ULTIMATE.start_sll_insert_~head#1.base_23| (store (select |v_#memory_int_123| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0 (select (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0)))) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| 0) (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 0) (= |v_#memory_$Pointer$.offset_48| (store |v_#memory_$Pointer$.offset_106| |v_ULTIMATE.start_sll_insert_~head#1.base_23| (store (select |v_#memory_$Pointer$.offset_106| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0 0))) (= (store |v_#memory_$Pointer$.base_106| |v_ULTIMATE.start_sll_insert_~head#1.base_23| (store (select |v_#memory_$Pointer$.base_106| |v_ULTIMATE.start_sll_insert_~head#1.base_23|) 0 |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|)) |v_#memory_$Pointer$.base_48|)) (and (= (store |v_#memory_int_123| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| (store (select |v_#memory_int_123| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 4) (select (select |v_#memory_int_46| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 4)))) |v_#memory_int_46|) (= (store |v_#memory_$Pointer$.base_106| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| (store (select |v_#memory_$Pointer$.base_106| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 4) |v_ULTIMATE.start_sll_insert_~new_node~0#1.base_29|)) |v_#memory_$Pointer$.base_48|) (or (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 0)) (not (= |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| 0))) (= (store |v_#memory_$Pointer$.offset_106| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32| (store (select |v_#memory_$Pointer$.offset_106| |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base_32|) (+ |v_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset_32| 4) 0)) |v_#memory_$Pointer$.offset_48|))))) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-23 20:34:24,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:34:24,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:34:24,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2023-11-23 20:34:24,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643950559] [2023-11-23 20:34:24,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:24,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 20:34:24,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 20:34:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1845, Unknown=18, NotChecked=174, Total=2162 [2023-11-23 20:34:24,652 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 31 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 20:34:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:26,547 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-11-23 20:34:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 20:34:26,555 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2023-11-23 20:34:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:26,556 INFO L225 Difference]: With dead ends: 26 [2023-11-23 20:34:26,556 INFO L226 Difference]: Without dead ends: 23 [2023-11-23 20:34:26,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=201, Invalid=2758, Unknown=19, NotChecked=214, Total=3192 [2023-11-23 20:34:26,559 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:26,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 123 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:34:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-23 20:34:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-23 20:34:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:34:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-23 20:34:26,573 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 24 [2023-11-23 20:34:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:26,574 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-23 20:34:26,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 20:34:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-23 20:34:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:34:26,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:26,576 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:26,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 20:34:26,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:26,796 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:26,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:26,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1690262548, now seen corresponding path program 3 times [2023-11-23 20:34:26,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:26,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141081956] [2023-11-23 20:34:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:26,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 20:34:27,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:27,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141081956] [2023-11-23 20:34:27,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141081956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:27,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767988128] [2023-11-23 20:34:27,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 20:34:27,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:27,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:27,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:27,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:34:27,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 20:34:27,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:34:27,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:34:27,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 20:34:27,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 20:34:28,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767988128] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:28,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:34:28,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 11 [2023-11-23 20:34:28,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212056750] [2023-11-23 20:34:28,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:28,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:34:28,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:28,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:34:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:34:28,138 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:34:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:28,203 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2023-11-23 20:34:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:28,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-11-23 20:34:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:28,204 INFO L225 Difference]: With dead ends: 28 [2023-11-23 20:34:28,204 INFO L226 Difference]: Without dead ends: 22 [2023-11-23 20:34:28,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-23 20:34:28,206 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:28,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:34:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-23 20:34:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-23 20:34:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:34:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-23 20:34:28,220 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 25 [2023-11-23 20:34:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:28,220 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-23 20:34:28,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:34:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-23 20:34:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 20:34:28,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:28,222 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:28,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:28,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:28,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:28,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1089623622, now seen corresponding path program 1 times [2023-11-23 20:34:28,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:28,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094853444] [2023-11-23 20:34:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:34:30,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:30,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094853444] [2023-11-23 20:34:30,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094853444] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:30,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504314843] [2023-11-23 20:34:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:30,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:30,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:30,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:30,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5f5531-66c7-4353-81e7-fa98813ec387/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:34:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:31,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 112 conjunts are in the unsatisfiable core [2023-11-23 20:34:31,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:31,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:34:31,590 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 27 treesize of output 15 [2023-11-23 20:34:31,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 20:34:31,604 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 7 treesize of output 3 [2023-11-23 20:34:31,642 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 [2023-11-23 20:34:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:31,752 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 [2023-11-23 20:34:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:31,772 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 35 treesize of output 26 [2023-11-23 20:34:31,795 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-23 20:34:31,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-23 20:34:32,318 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 76 [2023-11-23 20:34:32,350 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-11-23 20:34:32,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 179 treesize of output 122 [2023-11-23 20:34:32,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:32,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 43 [2023-11-23 20:34:32,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:32,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2023-11-23 20:34:32,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:32,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:32,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 25 [2023-11-23 20:34:32,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 34 treesize of output 19 [2023-11-23 20:34:32,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 20:34:32,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 39 [2023-11-23 20:34:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:32,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 20:34:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:34:32,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:33,067 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) (.cse7 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0)) (.cse6 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0))) (and (or (forall ((v_DerPreprocessor_10 (Array Int Int)) (v_ArrVal_680 Int) (v_DerPreprocessor_11 (Array Int Int)) (v_ArrVal_676 (Array Int Int)) (v_ArrVal_675 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_675)) (.cse2 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_10) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_676))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (+ (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_11))) (store .cse0 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) .cse1 v_ArrVal_680))) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))))) (not .cse6) (not .cse7)) (or (forall ((v_ArrVal_680 Int) (v_DerPreprocessor_9 (Array Int Int)) (v_ArrVal_676 (Array Int Int)) (v_ArrVal_675 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse13 (+ |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4))) (let ((.cse12 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) .cse13 |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_675)) (.cse9 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) .cse13 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_676))) (let ((.cse10 (select (select .cse9 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse11 (+ (select (select .cse12 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_DerPreprocessor_9))) (store .cse8 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select .cse8 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) .cse1 v_ArrVal_680))) (select (select .cse9 .cse10) .cse11)) (select (select .cse12 .cse10) .cse11))))))) (and .cse7 .cse6)))) is different from false [2023-11-23 20:34:33,106 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_sll_insert_~last~0#1.base| 0)) (.cse7 (= |c_ULTIMATE.start_sll_insert_~last~0#1.offset| 0)) (.cse2 (+ |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4))) (and (or (not .cse0) (forall ((v_DerPreprocessor_10 (Array Int Int)) (v_ArrVal_680 Int) (v_DerPreprocessor_11 (Array Int Int)) (v_ArrVal_676 (Array Int Int)) (v_ArrVal_675 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse6 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_675)) (.cse3 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_10) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_676))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (+ (select (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_11))) (store .cse1 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) .cse2 v_ArrVal_680))) (select (select .cse3 .cse4) .cse5)) (select (select .cse6 .cse4) .cse5)))))) (not .cse7)) (or (and .cse0 .cse7) (forall ((v_ArrVal_680 Int) (v_DerPreprocessor_9 (Array Int Int)) (v_ArrVal_676 (Array Int Int)) (v_ArrVal_675 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse13 (+ |c_ULTIMATE.start_sll_insert_~last~0#1.offset| 4))) (let ((.cse12 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~last~0#1.base|) .cse13 |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_675)) (.cse9 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base|) .cse13 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_676))) (let ((.cse10 (select (select .cse9 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse11 (+ (select (select .cse12 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_DerPreprocessor_9))) (store .cse8 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select .cse8 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) .cse2 v_ArrVal_680))) (select (select .cse9 .cse10) .cse11)) (select (select .cse12 .cse10) .cse11)))))))))) is different from false [2023-11-23 20:34:33,150 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse16 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|)) (.cse8 (select .cse16 |c_ULTIMATE.start_sll_insert_~head#1.offset|))) (let ((.cse9 (= .cse8 0)) (.cse10 (= .cse2 0)) (.cse1 (+ 4 |c_ULTIMATE.start_sll_insert_#t~ret7#1.offset|))) (and (or (forall ((v_ArrVal_680 Int) (v_DerPreprocessor_9 (Array Int Int)) (v_ArrVal_676 (Array Int Int)) (v_ArrVal_675 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse7 (+ .cse8 4))) (let ((.cse6 (store (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) .cse7 |c_ULTIMATE.start_sll_insert_#t~ret7#1.offset|)) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_675)) (.cse3 (store (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) .cse7 |c_ULTIMATE.start_sll_insert_#t~ret7#1.base|)) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_676))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (+ (select (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse0 (store |c_#memory_int| .cse2 v_DerPreprocessor_9))) (store .cse0 |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_insert_#t~ret7#1.base|) .cse1 v_ArrVal_680))) (select (select .cse3 .cse4) .cse5)) (select (select .cse6 .cse4) .cse5))))))) (and .cse9 .cse10)) (or (not .cse9) (not .cse10) (forall ((v_DerPreprocessor_10 (Array Int Int)) (v_ArrVal_680 Int) (v_DerPreprocessor_11 (Array Int Int)) (v_ArrVal_676 (Array Int Int)) (v_ArrVal_675 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse15 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| (store .cse16 |c_ULTIMATE.start_sll_insert_~head#1.offset| |c_ULTIMATE.start_sll_insert_#t~ret7#1.offset|)) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_675)) (.cse12 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_10) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_676))) (let ((.cse13 (select (select .cse12 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse14 (+ (select (select .cse15 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_DerPreprocessor_11))) (store .cse11 |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| (store (select .cse11 |c_ULTIMATE.start_sll_insert_#t~ret7#1.base|) .cse1 v_ArrVal_680))) (select (select .cse12 .cse13) .cse14)) (select (select .cse15 .cse13) .cse14))))))))))) is different from false [2023-11-23 20:34:33,930 INFO L349 Elim1Store]: treesize reduction 706, result has 60.2 percent of original size [2023-11-23 20:34:33,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 2733 treesize of output 3317 [2023-11-23 20:34:34,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 20:34:34,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2850 treesize of output 3025 [2023-11-23 20:34:34,112 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 2333 treesize of output 2183 [2023-11-23 20:34:34,178 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 2703 treesize of output 2322 [2023-11-23 20:34:34,283 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 131 treesize of output 4