./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:32:37,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:32:38,006 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 20:32:38,037 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:32:38,038 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:32:38,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:32:38,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:32:38,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:32:38,082 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:32:38,083 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:32:38,084 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:32:38,085 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:32:38,086 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:32:38,086 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:32:38,087 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:32:38,088 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:32:38,089 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:32:38,090 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:32:38,091 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:32:38,091 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:32:38,092 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:32:38,093 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:32:38,094 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:32:38,095 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 20:32:38,096 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:32:38,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:32:38,098 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:32:38,098 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:32:38,099 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 20:32:38,100 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:32:38,101 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 20:32:38,101 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:32:38,102 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 20:32:38,103 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:32:38,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:32:38,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:32:38,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:32:38,106 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:32:38,106 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:32:38,107 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 20:32:38,108 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:32:38,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:32:38,109 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 20:32:38,110 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:32:38,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:32:38,111 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_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 [2023-11-06 20:32:38,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:32:38,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:32:38,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:32:38,509 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:32:38,509 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:32:38,512 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2023-11-06 20:32:41,907 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:32:42,193 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:32:42,194 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2023-11-06 20:32:42,214 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/data/667f8864e/e9a4654ef34146158e4d6133290b9e25/FLAG8cceb4092 [2023-11-06 20:32:42,246 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/data/667f8864e/e9a4654ef34146158e4d6133290b9e25 [2023-11-06 20:32:42,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:32:42,259 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:32:42,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:32:42,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:32:42,267 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:32:42,268 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:42,269 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b7e8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42, skipping insertion in model container [2023-11-06 20:32:42,269 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:42,343 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:32:42,772 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_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/sv-benchmarks/c/list-simple/sll2c_append_unequal.i[24587,24600] [2023-11-06 20:32:42,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:32:42,792 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:32:42,855 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_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/sv-benchmarks/c/list-simple/sll2c_append_unequal.i[24587,24600] [2023-11-06 20:32:42,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:32:42,904 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:32:42,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42 WrapperNode [2023-11-06 20:32:42,905 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:32:42,906 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:32:42,906 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:32:42,907 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:32:42,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:42,929 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:42,961 INFO L138 Inliner]: procedures = 127, calls = 46, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 161 [2023-11-06 20:32:42,961 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:32:42,962 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:32:42,962 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:32:42,963 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:32:42,973 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:42,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:42,979 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:42,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:42,991 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:42,996 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:42,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:43,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:43,005 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:32:43,007 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:32:43,007 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:32:43,007 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:32:43,008 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (1/1) ... [2023-11-06 20:32:43,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:32:43,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:43,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:32:43,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:32:43,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:32:43,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:32:43,100 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-06 20:32:43,101 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-06 20:32:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:32:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:32:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:32:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:32:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:32:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:32:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 20:32:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:32:43,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:32:43,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:32:43,254 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:32:43,257 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:32:43,626 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:32:43,698 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:32:43,698 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 20:32:43,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:32:43 BoogieIcfgContainer [2023-11-06 20:32:43,702 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:32:43,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:32:43,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:32:43,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:32:43,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:32:42" (1/3) ... [2023-11-06 20:32:43,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cd2d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:32:43, skipping insertion in model container [2023-11-06 20:32:43,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:42" (2/3) ... [2023-11-06 20:32:43,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cd2d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:32:43, skipping insertion in model container [2023-11-06 20:32:43,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:32:43" (3/3) ... [2023-11-06 20:32:43,714 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_append_unequal.i [2023-11-06 20:32:43,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:32:43,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 20:32:43,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:32:43,812 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@503e7255, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:32:43,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 20:32:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:32:43,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:32:43,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:43,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:43,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:43,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1374255989, now seen corresponding path program 1 times [2023-11-06 20:32:43,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:43,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327261293] [2023-11-06 20:32:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:43,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 20:32:44,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:44,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327261293] [2023-11-06 20:32:44,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327261293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:44,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:44,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:32:44,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822110101] [2023-11-06 20:32:44,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:44,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:32:44,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:32:44,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:44,472 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 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) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:32:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:44,548 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2023-11-06 20:32:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:32:44,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 18 [2023-11-06 20:32:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:44,562 INFO L225 Difference]: With dead ends: 61 [2023-11-06 20:32:44,562 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 20:32:44,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:44,577 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:44,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 70 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:32:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 20:32:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-11-06 20:32:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:32:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2023-11-06 20:32:44,643 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 18 [2023-11-06 20:32:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:44,644 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2023-11-06 20:32:44,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:32:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2023-11-06 20:32:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 20:32:44,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:44,647 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:44,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:32:44,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:44,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1632824436, now seen corresponding path program 1 times [2023-11-06 20:32:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:44,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637797893] [2023-11-06 20:32:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:44,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:32:45,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:45,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637797893] [2023-11-06 20:32:45,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637797893] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:45,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50338146] [2023-11-06 20:32:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:45,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:45,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:45,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:45,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:32:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:45,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 20:32:45,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:46,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-06 20:32:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:32:46,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-06 20:32:46,443 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-06 20:32:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:32:46,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:32:46,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50338146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:46,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233627343] [2023-11-06 20:32:46,651 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-06 20:32:46,652 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:32:46,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:32:46,663 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:32:46,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:32:49,337 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2023-11-06 20:32:49,354 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:33:05,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '280#(and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~last~2#1.offset|) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_14| Int) (|v_#memory_$Pointer$.base_60| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_57| (Array Int (Array Int Int))) (|v_#memory_int_68| (Array Int (Array Int Int))) (|v_#memory_int_16| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_append_#in~head#1.base_8| Int)) (and (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_57| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (select |v_#memory_$Pointer$.offset_57| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 0)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_14| (store (select (store |v_#memory_$Pointer$.offset_57| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (select |v_#memory_$Pointer$.offset_57| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 0)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0 0))) (or (and (= |v_ULTIMATE.start_sll_circular_append_~head#1.base_14| |v_ULTIMATE.start_sll_circular_append_#in~head#1.base_8|) (exists ((|v_#memory_$Pointer$.offset_53| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_53| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (store (select |v_#memory_$Pointer$.offset_53| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 0) 4 (select (select |v_#memory_$Pointer$.offset_57| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 4))) |v_#memory_$Pointer$.offset_57|)) (<= (+ (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) 1) |#StackHeapBarrier|) (exists ((|v_#memory_int_64| (Array Int (Array Int Int))) (|v_#memory_int_38| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_64| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (select |v_#memory_int_64| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 (select (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0))) |v_#memory_int_38|) (= |v_#memory_int_68| (store |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 4 5))))) (exists ((|v_#length_21| (Array Int Int))) (= |#length| (store |v_#length_21| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) 8))) (exists ((|v_#memory_int_67| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_56| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| Int) (|v_old(#memory_int)_AFTER_CALL_12| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_59| (Array Int (Array Int Int)))) (and (= (select (select (store |v_#memory_$Pointer$.offset_56| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.offset_56| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (store |v_#memory_int_67| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_int_67| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_12| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0))) |v_old(#memory_int)_AFTER_CALL_12|) (= (select (select (store |v_#memory_$Pointer$.base_59| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.base_59| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 |ULTIMATE.start_sll_circular_create_#res#1.base|)) |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_circular_create_#res#1.base|))) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) 0)) (exists ((|v_#valid_33| (Array Int Int))) (and (= |#valid| (store |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) 1)) (= (select |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0))) (= |v_ULTIMATE.start_sll_circular_append_#in~head#1.base_8| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.base_56| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_56| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (store (select |v_#memory_$Pointer$.base_56| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 0) 4 (select (select |v_#memory_$Pointer$.base_60| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 4))) |v_#memory_$Pointer$.base_60|))) (and (exists ((|v_#memory_int_67| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_56| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| Int) (|v_#memory_$Pointer$.base_59| (Array Int (Array Int Int))) (|v_#memory_int_BEFORE_CALL_21| (Array Int (Array Int Int)))) (and (= (select (select (store |v_#memory_$Pointer$.offset_56| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.offset_56| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (select (select (store |v_#memory_$Pointer$.base_59| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_$Pointer$.base_59| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 |ULTIMATE.start_sll_circular_create_#res#1.base|)) |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_circular_create_#res#1.base|) (= (store |v_#memory_int_67| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15| (store (select |v_#memory_int_67| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0 (select (select |v_#memory_int_BEFORE_CALL_21| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_15|) 0))) |v_#memory_int_BEFORE_CALL_21|))) (= |v_ULTIMATE.start_sll_circular_append_~head#1.base_14| |v_ULTIMATE.start_sll_circular_append_#in~head#1.base_8|) (exists ((|v_#memory_$Pointer$.offset_53| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_53| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (store (select |v_#memory_$Pointer$.offset_53| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 0) 4 (select (select |v_#memory_$Pointer$.offset_57| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 4))) |v_#memory_$Pointer$.offset_57|)) (<= (+ (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) 1) |#StackHeapBarrier|) (exists ((|v_#memory_int_64| (Array Int (Array Int Int))) (|v_#memory_int_38| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_64| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (select |v_#memory_int_64| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 (select (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0))) |v_#memory_int_38|) (= |v_#memory_int_68| (store |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 4 5))))) (exists ((|v_#length_21| (Array Int Int))) (= |#length| (store |v_#length_21| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) 8))) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) 0)) (exists ((|v_#valid_33| (Array Int Int))) (and (= |#valid| (store |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) 1)) (= (select |v_#valid_33| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0))) (= |v_ULTIMATE.start_sll_circular_append_#in~head#1.base_8| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.base_56| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_56| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (store (select |v_#memory_$Pointer$.base_56| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 0) 4 (select (select |v_#memory_$Pointer$.base_60| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 4))) |v_#memory_$Pointer$.base_60|)))) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_60| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (select |v_#memory_$Pointer$.base_60| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0))) |v_ULTIMATE.start_sll_circular_append_~head#1.base_14| (store (select (store |v_#memory_$Pointer$.base_60| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (select |v_#memory_$Pointer$.base_60| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0))) |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)))) (= |#memory_int| (store |v_#memory_int_16| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14| (store (select |v_#memory_int_16| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)))) (<= 2 |v_ULTIMATE.start_sll_circular_append_#in~head#1.base_8|) (= |v_#memory_int_16| (store |v_#memory_int_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) (store (select |v_#memory_int_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0 (select (select |v_#memory_int_16| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) 0)))) (= (select (select |v_#memory_$Pointer$.offset_57| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0) 0) (= 0 (select (select |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|) 0)) (<= 2 |v_ULTIMATE.start_sll_circular_append_~head#1.base_14|))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~last~2#1.base|) |ULTIMATE.start_main_~last~2#1.offset|)) (= |ULTIMATE.start_main_~last~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~last~2#1.base|) |ULTIMATE.start_main_~last~2#1.offset|)) (= |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_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_main_~ptr~0#1.base|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-06 20:33:05,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:33:05,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 20:33:05,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-11-06 20:33:05,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220268279] [2023-11-06 20:33:05,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 20:33:05,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 20:33:05,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:05,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 20:33:05,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1356, Unknown=14, NotChecked=0, Total=1482 [2023-11-06 20:33:05,387 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 20 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 20:33:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:06,101 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2023-11-06 20:33:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 20:33:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 25 [2023-11-06 20:33:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:06,104 INFO L225 Difference]: With dead ends: 40 [2023-11-06 20:33:06,104 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 20:33:06,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=164, Invalid=1801, Unknown=15, NotChecked=0, Total=1980 [2023-11-06 20:33:06,107 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:06,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 238 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:33:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 20:33:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-11-06 20:33:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:33:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-11-06 20:33:06,115 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 25 [2023-11-06 20:33:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:06,115 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-11-06 20:33:06,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 20:33:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-11-06 20:33:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 20:33:06,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:06,118 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:06,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 20:33:06,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:06,324 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:33:06,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:06,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1696549931, now seen corresponding path program 1 times [2023-11-06 20:33:06,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:06,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443531604] [2023-11-06 20:33:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:06,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:33:07,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:07,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443531604] [2023-11-06 20:33:07,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443531604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:33:07,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256465686] [2023-11-06 20:33:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:07,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:07,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:07,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:33:07,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f1b1d9-2a0b-418d-8057-faa2f42fabab/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:33:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:07,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-06 20:33:08,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:33:08,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 20:33:08,427 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 20:33:08,428 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 20:33:08,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 20:33:08,734 INFO L322 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-06 20:33:08,735 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2023-11-06 20:33:08,882 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 20:33:08,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 23 [2023-11-06 20:33:08,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 20:33:08,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 20:33:09,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:33:09,105 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 20:33:09,106 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 45 [2023-11-06 20:33:09,144 INFO L322 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-06 20:33:09,145 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-06 20:33:09,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:33:09,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 20:33:09,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:33:09,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-11-06 20:33:09,678 INFO L322 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-11-06 20:33:09,679 INFO L351 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 69 treesize of output 57 [2023-11-06 20:33:09,737 INFO L322 Elim1Store]: treesize reduction 74, result has 21.3 percent of original size [2023-11-06 20:33:09,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 101 [2023-11-06 20:33:09,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:33:09,756 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 11 [2023-11-06 20:33:09,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-06 20:33:09,937 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 20:33:10,024 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 20:33:10,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 19 [2023-11-06 20:33:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:33:10,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:33:10,078 WARN L839 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| Int) (v_ArrVal_308 (Array Int Int)) (v_ArrVal_307 (Array Int Int))) (not (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_append_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_307))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse0 (select (select .cse1 .cse0) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_append_~last~1#1.offset| |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_308) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2023-11-06 20:33:10,574 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16| Int) (|ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| Int) (v_ArrVal_308 (Array Int Int)) (v_ArrVal_307 (Array Int Int))) (or (< (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|) |v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16|) (not (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16|) .cse2 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_307))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse0 (select (select .cse1 .cse0) (select (select (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16|) .cse2 |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_308) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))))) is different from false [2023-11-06 20:33:10,723 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16| Int) (v_ArrVal_314 (Array Int Int)) (|ULTIMATE.start_sll_circular_append_~new_last~0#1.offset| Int) (v_ArrVal_308 (Array Int Int)) (v_ArrVal_307 (Array Int Int)) (v_ArrVal_313 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_19| Int)) (let ((.cse4 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_19| v_ArrVal_314))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_19|) 0)) (not (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_19| v_ArrVal_313))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16| (store (select .cse4 |v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16|) .cse3 |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_19|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_19| v_ArrVal_307))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select .cse0 .cse1) (select (select (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16| (store (select .cse2 |v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16|) .cse3 |ULTIMATE.start_sll_circular_append_~new_last~0#1.offset|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_19| v_ArrVal_308) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse1)))))) (< (select (select .cse4 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|) |v_ULTIMATE.start_sll_circular_append_~last~1#1.base_16|) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_19| 1))))) is different from false [2023-11-06 20:33:10,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256465686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:33:10,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662408842] [2023-11-06 20:33:10,737 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-06 20:33:10,737 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:33:10,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:33:10,738 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:33:10,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs