./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:57:26,108 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:57:26,213 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 18:57:26,227 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:57:26,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:57:26,257 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:57:26,258 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:57:26,258 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:57:26,259 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:57:26,260 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:57:26,260 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:57:26,261 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:57:26,261 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:57:26,262 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:57:26,262 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:57:26,263 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:57:26,263 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:57:26,264 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:57:26,264 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:57:26,265 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:57:26,266 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:57:26,274 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:57:26,275 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:57:26,275 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 18:57:26,276 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 18:57:26,276 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:57:26,277 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 18:57:26,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:57:26,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 18:57:26,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:57:26,280 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 18:57:26,280 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 18:57:26,280 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 18:57:26,281 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:57:26,281 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:57:26,281 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:57:26,281 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:57:26,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:57:26,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:57:26,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:57:26,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 18:57:26,283 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:57:26,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:57:26,284 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:57:26,284 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 18:57:26,285 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:57:26,285 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:57:26,285 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_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a [2023-11-21 18:57:26,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:57:26,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:57:26,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:57:26,584 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:57:26,585 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:57:26,587 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/list-simple/sll2n_update_all.i [2023-11-21 18:57:29,741 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:57:30,220 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:57:30,221 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/sv-benchmarks/c/list-simple/sll2n_update_all.i [2023-11-21 18:57:30,239 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/data/c79d71701/6e36047a2be64f2f9685748645c0c3a8/FLAGfc9b10726 [2023-11-21 18:57:30,257 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/data/c79d71701/6e36047a2be64f2f9685748645c0c3a8 [2023-11-21 18:57:30,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:57:30,264 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:57:30,266 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:57:30,266 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:57:30,272 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:57:30,273 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433adb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30, skipping insertion in model container [2023-11-21 18:57:30,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,320 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:57:30,675 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_045234c9-e2ff-4a64-92e7-2231d15df21d/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2023-11-21 18:57:30,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:57:30,699 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:57:30,778 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_045234c9-e2ff-4a64-92e7-2231d15df21d/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2023-11-21 18:57:30,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:57:30,814 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:57:30,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30 WrapperNode [2023-11-21 18:57:30,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:57:30,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:57:30,816 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:57:30,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:57:30,825 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,873 INFO L138 Inliner]: procedures = 126, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 121 [2023-11-21 18:57:30,874 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:57:30,875 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:57:30,875 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:57:30,875 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:57:30,886 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,891 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,891 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,899 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,904 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,906 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,908 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,912 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:57:30,913 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:57:30,913 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:57:30,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:57:30,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (1/1) ... [2023-11-21 18:57:30,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:57:30,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:57:30,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:57:30,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:57:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 18:57:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 18:57:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 18:57:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:57:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 18:57:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 18:57:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 18:57:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 18:57:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:57:31,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:57:31,182 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:57:31,191 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:57:31,476 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:57:31,570 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:57:31,574 INFO L308 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-21 18:57:31,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:57:31 BoogieIcfgContainer [2023-11-21 18:57:31,577 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:57:31,581 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:57:31,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:57:31,584 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:57:31,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:57:30" (1/3) ... [2023-11-21 18:57:31,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c32da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:57:31, skipping insertion in model container [2023-11-21 18:57:31,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:57:30" (2/3) ... [2023-11-21 18:57:31,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c32da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:57:31, skipping insertion in model container [2023-11-21 18:57:31,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:57:31" (3/3) ... [2023-11-21 18:57:31,588 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_update_all.i [2023-11-21 18:57:31,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:57:31,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 18:57:31,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:57:31,669 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;@414fc841, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:57:31,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 18:57:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 18:57:31,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:31,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:31,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:31,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash -556299951, now seen corresponding path program 1 times [2023-11-21 18:57:31,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:31,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545039548] [2023-11-21 18:57:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:31,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:32,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:32,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545039548] [2023-11-21 18:57:32,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545039548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:57:32,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:57:32,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:57:32,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37609114] [2023-11-21 18:57:32,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:57:32,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:57:32,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:57:32,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:57:32,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:57:32,147 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:32,226 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2023-11-21 18:57:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:57:32,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 18:57:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:32,241 INFO L225 Difference]: With dead ends: 27 [2023-11-21 18:57:32,242 INFO L226 Difference]: Without dead ends: 12 [2023-11-21 18:57:32,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:57:32,254 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:32,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:57:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-21 18:57:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2023-11-21 18:57:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2023-11-21 18:57:32,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2023-11-21 18:57:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:32,307 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2023-11-21 18:57:32,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2023-11-21 18:57:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 18:57:32,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:32,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:32,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 18:57:32,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:32,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1698602241, now seen corresponding path program 1 times [2023-11-21 18:57:32,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445673995] [2023-11-21 18:57:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:32,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:32,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:32,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445673995] [2023-11-21 18:57:32,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445673995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:57:32,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55927453] [2023-11-21 18:57:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:32,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:32,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:57:32,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:57:32,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 18:57:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:32,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:57:32,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:32,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:32,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55927453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:32,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1226158468] [2023-11-21 18:57:32,719 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-21 18:57:32,720 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:57:32,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:57:32,730 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:57:32,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:57:34,628 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:57:35,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1226158468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:57:35,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:57:35,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2023-11-21 18:57:35,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049892407] [2023-11-21 18:57:35,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:57:35,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:57:35,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:57:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:57:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-21 18:57:35,016 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:35,091 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2023-11-21 18:57:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:57:35,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-21 18:57:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:35,092 INFO L225 Difference]: With dead ends: 18 [2023-11-21 18:57:35,093 INFO L226 Difference]: Without dead ends: 13 [2023-11-21 18:57:35,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-21 18:57:35,095 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:35,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:57:35,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-21 18:57:35,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-11-21 18:57:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-11-21 18:57:35,101 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2023-11-21 18:57:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:35,101 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-11-21 18:57:35,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-11-21 18:57:35,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 18:57:35,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:35,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:35,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:35,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:35,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:35,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:35,318 INFO L85 PathProgramCache]: Analyzing trace with hash 741780862, now seen corresponding path program 1 times [2023-11-21 18:57:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215267025] [2023-11-21 18:57:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:35,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:57:35,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:35,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215267025] [2023-11-21 18:57:35,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215267025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:57:35,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009661101] [2023-11-21 18:57:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:35,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:35,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:57:35,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:57:35,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 18:57:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:35,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:57:35,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:57:35,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:57:35,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009661101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:35,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630843918] [2023-11-21 18:57:35,731 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-21 18:57:35,731 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:57:35,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:57:35,732 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:57:35,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:57:37,616 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:57:38,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [630843918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:57:38,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:57:38,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2023-11-21 18:57:38,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168121147] [2023-11-21 18:57:38,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:57:38,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 18:57:38,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:57:38,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 18:57:38,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-21 18:57:38,536 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:38,657 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2023-11-21 18:57:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 18:57:38,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-21 18:57:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:38,659 INFO L225 Difference]: With dead ends: 19 [2023-11-21 18:57:38,659 INFO L226 Difference]: Without dead ends: 14 [2023-11-21 18:57:38,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-21 18:57:38,661 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:38,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:57:38,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-21 18:57:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-11-21 18:57:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2023-11-21 18:57:38,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 11 [2023-11-21 18:57:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:38,669 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2023-11-21 18:57:38,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2023-11-21 18:57:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 18:57:38,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:38,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:38,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:38,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:38,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:38,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash 901158905, now seen corresponding path program 1 times [2023-11-21 18:57:38,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:38,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608270819] [2023-11-21 18:57:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:38,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:57:39,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:39,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608270819] [2023-11-21 18:57:39,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608270819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:57:39,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256399558] [2023-11-21 18:57:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:39,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:39,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:57:39,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:57:39,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 18:57:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:39,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:57:39,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:57:39,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:57:39,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256399558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:39,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334399101] [2023-11-21 18:57:39,215 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-21 18:57:39,216 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:57:39,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:57:39,216 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:57:39,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:57:42,844 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:57:48,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '370#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (exists ((|v_ULTIMATE.start_main_~new_data~0#1_22| Int) (|v_ULTIMATE.start_main_~i~0#1_57| Int)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~i~0#1_57| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |v_ULTIMATE.start_main_~new_data~0#1_22| 3) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_#memory_int_73| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_63| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_63| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_31| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.base_31| Int)) (and (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_63| |v_ULTIMATE.start_sll_update_at_~head#1.base_31| (store (select |v_#memory_$Pointer$.base_63| |v_ULTIMATE.start_sll_update_at_~head#1.base_31|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_31| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_31|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_31|)))) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_31|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_31|)) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_63| |v_ULTIMATE.start_sll_update_at_~head#1.base_31| (store (select |v_#memory_$Pointer$.offset_63| |v_ULTIMATE.start_sll_update_at_~head#1.base_31|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_31| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_31|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_31|)))) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_31|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_31|) 3) (= |#memory_int| (store |v_#memory_int_73| |v_ULTIMATE.start_sll_update_at_~head#1.base_31| (store (select |v_#memory_int_73| |v_ULTIMATE.start_sll_update_at_~head#1.base_31|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_31| (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_31|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_31|)))))) (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_22|) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2023-11-21 18:57:48,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:57:48,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:57:48,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-21 18:57:48,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254816517] [2023-11-21 18:57:48,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:57:48,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:57:48,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:57:48,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:57:48,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=125, Unknown=2, NotChecked=0, Total=156 [2023-11-21 18:57:48,430 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:48,474 INFO L93 Difference]: Finished difference Result 24 states and 34 transitions. [2023-11-21 18:57:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:57:48,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-21 18:57:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:48,476 INFO L225 Difference]: With dead ends: 24 [2023-11-21 18:57:48,476 INFO L226 Difference]: Without dead ends: 15 [2023-11-21 18:57:48,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=29, Invalid=125, Unknown=2, NotChecked=0, Total=156 [2023-11-21 18:57:48,477 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:48,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 18:57:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-21 18:57:48,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-21 18:57:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2023-11-21 18:57:48,490 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 12 [2023-11-21 18:57:48,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:48,490 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2023-11-21 18:57:48,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2023-11-21 18:57:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 18:57:48,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:48,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:48,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:48,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:48,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:48,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash -134767861, now seen corresponding path program 2 times [2023-11-21 18:57:48,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:48,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554330785] [2023-11-21 18:57:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:48,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 18:57:48,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:48,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554330785] [2023-11-21 18:57:48,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554330785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:57:48,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:57:48,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:57:48,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867605125] [2023-11-21 18:57:48,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:57:48,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:57:48,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:57:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:57:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:57:48,815 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:48,871 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-11-21 18:57:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:57:48,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-21 18:57:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:48,872 INFO L225 Difference]: With dead ends: 29 [2023-11-21 18:57:48,873 INFO L226 Difference]: Without dead ends: 22 [2023-11-21 18:57:48,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:57:48,874 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:48,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 18:57:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-21 18:57:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2023-11-21 18:57:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-21 18:57:48,885 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2023-11-21 18:57:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:48,885 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-21 18:57:48,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-21 18:57:48,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 18:57:48,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:48,887 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:48,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 18:57:48,887 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:48,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:48,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1945415764, now seen corresponding path program 3 times [2023-11-21 18:57:48,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:48,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239779804] [2023-11-21 18:57:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:48,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:50,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239779804] [2023-11-21 18:57:50,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239779804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:57:50,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941092530] [2023-11-21 18:57:50,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 18:57:50,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:50,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:57:50,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:57:50,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 18:57:50,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 18:57:50,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:57:50,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-21 18:57:50,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:50,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 18:57:50,538 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 18:57:50,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 18:57:50,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 18:57:50,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-21 18:57:50,645 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 [2023-11-21 18:57:50,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-21 18:57:50,778 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 [2023-11-21 18:57:50,913 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 [2023-11-21 18:57:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:50,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:51,035 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_276 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_276) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2023-11-21 18:57:51,044 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_276 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_276) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2023-11-21 18:57:51,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 18:57:51,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-11-21 18:57:51,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 18:57:51,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 61 [2023-11-21 18:57:51,081 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 23 treesize of output 21 [2023-11-21 18:57:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-21 18:57:51,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941092530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:51,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856434460] [2023-11-21 18:57:51,389 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-21 18:57:51,389 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:57:51,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:57:51,390 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:57:51,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:57:52,617 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:57:56,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '643#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (exists ((|v_ULTIMATE.start_main_~new_data~0#1_30| Int) (|v_ULTIMATE.start_main_~i~0#1_67| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~new_data~0#1_30| 3) (exists ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_44| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.base_46| Int) (|v_#memory_$Pointer$.base_83| (Array Int (Array Int Int))) (|v_#memory_int_93| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_81| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_81| |v_ULTIMATE.start_sll_update_at_~head#1.base_46| (store (select |v_#memory_$Pointer$.offset_81| |v_ULTIMATE.start_sll_update_at_~head#1.base_46|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_44| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_46|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_44|)))) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_46|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_44|)) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_83| |v_ULTIMATE.start_sll_update_at_~head#1.base_46| (store (select |v_#memory_$Pointer$.base_83| |v_ULTIMATE.start_sll_update_at_~head#1.base_46|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_44| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_46|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_44|)))) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_46|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_44|) 3) (= |#memory_int| (store |v_#memory_int_93| |v_ULTIMATE.start_sll_update_at_~head#1.base_46| (store (select |v_#memory_int_93| |v_ULTIMATE.start_sll_update_at_~head#1.base_46|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_44| (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_46|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_44|)))))) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |v_ULTIMATE.start_main_~i~0#1_67| 2) (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_30|) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2023-11-21 18:57:56,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:57:56,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:57:56,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-21 18:57:56,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957613144] [2023-11-21 18:57:56,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:57:56,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-21 18:57:56,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:57:56,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-21 18:57:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1285, Unknown=13, NotChecked=146, Total=1560 [2023-11-21 18:57:56,911 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:57,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:57,587 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2023-11-21 18:57:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 18:57:57,588 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-21 18:57:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:57,589 INFO L225 Difference]: With dead ends: 38 [2023-11-21 18:57:57,589 INFO L226 Difference]: Without dead ends: 36 [2023-11-21 18:57:57,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=187, Invalid=1788, Unknown=13, NotChecked=174, Total=2162 [2023-11-21 18:57:57,592 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:57,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 64 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 318 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2023-11-21 18:57:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-21 18:57:57,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2023-11-21 18:57:57,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:57,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2023-11-21 18:57:57,602 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 16 [2023-11-21 18:57:57,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:57,603 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2023-11-21 18:57:57,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2023-11-21 18:57:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 18:57:57,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:57,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:57,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:57,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:57,810 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:57,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash -179999106, now seen corresponding path program 1 times [2023-11-21 18:57:57,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:57,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094610652] [2023-11-21 18:57:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:57,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 18:57:57,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:57,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094610652] [2023-11-21 18:57:57,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094610652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:57:57,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:57:57,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:57:57,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967594102] [2023-11-21 18:57:57,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:57:57,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:57:57,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:57:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:57:57,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:57:57,906 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:57,957 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-11-21 18:57:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:57:57,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-21 18:57:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:57,961 INFO L225 Difference]: With dead ends: 35 [2023-11-21 18:57:57,961 INFO L226 Difference]: Without dead ends: 30 [2023-11-21 18:57:57,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:57:57,963 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:57,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 18:57:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-21 18:57:57,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-11-21 18:57:57,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-11-21 18:57:57,980 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2023-11-21 18:57:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:57,980 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-11-21 18:57:57,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-11-21 18:57:57,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 18:57:57,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:57,982 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 18:57:57,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:57:57,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:57,983 INFO L85 PathProgramCache]: Analyzing trace with hash -797557877, now seen corresponding path program 4 times [2023-11-21 18:57:57,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:57:57,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574022637] [2023-11-21 18:57:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:57,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:57:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 18:57:58,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:57:58,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574022637] [2023-11-21 18:57:58,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574022637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:57:58,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247946126] [2023-11-21 18:57:58,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 18:57:58,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:58,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:57:58,149 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:57:58,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 18:57:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:58,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 18:57:58,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 18:57:58,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 18:57:58,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247946126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:58,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350662846] [2023-11-21 18:57:58,350 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-21 18:57:58,350 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:57:58,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:57:58,350 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:57:58,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:57:59,606 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:58:03,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '984#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (exists ((|v_ULTIMATE.start_main_~i~0#1_78| Int) (|v_ULTIMATE.start_main_~new_data~0#1_38| Int)) (and (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_38|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_node_create_#res#1.offset| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |v_ULTIMATE.start_main_~i~0#1_78| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |v_ULTIMATE.start_main_~new_data~0#1_38| 3) (exists ((|v_ULTIMATE.start_sll_update_at_~head#1.base_59| Int) (|v_#memory_int_109| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_97| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_99| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_57| Int)) (and (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_59|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_57|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_59|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_57|) 3) (= |#memory_int| (store |v_#memory_int_109| |v_ULTIMATE.start_sll_update_at_~head#1.base_59| (store (select |v_#memory_int_109| |v_ULTIMATE.start_sll_update_at_~head#1.base_59|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_57| (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_59|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_57|)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_97| |v_ULTIMATE.start_sll_update_at_~head#1.base_59| (store (select |v_#memory_$Pointer$.offset_97| |v_ULTIMATE.start_sll_update_at_~head#1.base_59|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_57| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_59|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_57|)))) (= (store |v_#memory_$Pointer$.base_99| |v_ULTIMATE.start_sll_update_at_~head#1.base_59| (store (select |v_#memory_$Pointer$.base_99| |v_ULTIMATE.start_sll_update_at_~head#1.base_59|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_57| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_59|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_57|))) |#memory_$Pointer$.base|))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2023-11-21 18:58:03,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:58:03,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:58:03,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-11-21 18:58:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935041034] [2023-11-21 18:58:03,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:58:03,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 18:58:03,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:03,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 18:58:03,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=188, Unknown=1, NotChecked=0, Total=240 [2023-11-21 18:58:03,131 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:03,264 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2023-11-21 18:58:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 18:58:03,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-21 18:58:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:03,266 INFO L225 Difference]: With dead ends: 46 [2023-11-21 18:58:03,266 INFO L226 Difference]: Without dead ends: 37 [2023-11-21 18:58:03,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=65, Invalid=240, Unknown=1, NotChecked=0, Total=306 [2023-11-21 18:58:03,268 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:03,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:58:03,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-21 18:58:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2023-11-21 18:58:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2023-11-21 18:58:03,281 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 17 [2023-11-21 18:58:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:03,281 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2023-11-21 18:58:03,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2023-11-21 18:58:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 18:58:03,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:03,282 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:03,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 18:58:03,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:58:03,483 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:03,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1778671629, now seen corresponding path program 5 times [2023-11-21 18:58:03,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:03,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059275676] [2023-11-21 18:58:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:03,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 18:58:03,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:03,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059275676] [2023-11-21 18:58:03,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059275676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:58:03,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528636457] [2023-11-21 18:58:03,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 18:58:03,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:58:03,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:58:03,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:58:03,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 18:58:04,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-21 18:58:04,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:58:04,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:58:04,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:58:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 18:58:04,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:58:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 18:58:04,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528636457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:58:04,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1404460380] [2023-11-21 18:58:04,072 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-21 18:58:04,072 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:58:04,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:58:04,073 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:58:04,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:58:05,564 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:58:12,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1234#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= 1 |ULTIMATE.start_main_~len~0#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_90| Int) (|v_ULTIMATE.start_main_~new_data~0#1_47| Int)) (and (<= 1 |v_ULTIMATE.start_main_~new_data~0#1_47|) (exists ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_70| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.base_72| Int) (|v_#memory_$Pointer$.base_114| (Array Int (Array Int Int))) (|v_#memory_int_124| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_112| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_112| |v_ULTIMATE.start_sll_update_at_~head#1.base_72| (store (select |v_#memory_$Pointer$.offset_112| |v_ULTIMATE.start_sll_update_at_~head#1.base_72|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_72|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70|)))) (= (store |v_#memory_$Pointer$.base_114| |v_ULTIMATE.start_sll_update_at_~head#1.base_72| (store (select |v_#memory_$Pointer$.base_114| |v_ULTIMATE.start_sll_update_at_~head#1.base_72|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_72|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70|))) |#memory_$Pointer$.base|) (= |#memory_int| (store |v_#memory_int_124| |v_ULTIMATE.start_sll_update_at_~head#1.base_72| (store (select |v_#memory_int_124| |v_ULTIMATE.start_sll_update_at_~head#1.base_72|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70| (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_72|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70|)))) (<= 1 (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_72|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70|)))) (<= |ULTIMATE.start_main_~len~0#1| |v_ULTIMATE.start_main_~i~0#1_90|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2023-11-21 18:58:12,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:58:12,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:58:12,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-21 18:58:12,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759229180] [2023-11-21 18:58:12,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:58:12,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 18:58:12,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:12,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 18:58:12,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=218, Unknown=4, NotChecked=0, Total=272 [2023-11-21 18:58:12,779 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:12,862 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-11-21 18:58:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 18:58:12,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-21 18:58:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:12,864 INFO L225 Difference]: With dead ends: 39 [2023-11-21 18:58:12,864 INFO L226 Difference]: Without dead ends: 20 [2023-11-21 18:58:12,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=57, Invalid=245, Unknown=4, NotChecked=0, Total=306 [2023-11-21 18:58:12,866 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:12,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 16 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:58:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-21 18:58:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-21 18:58:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-11-21 18:58:12,874 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2023-11-21 18:58:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:12,874 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-11-21 18:58:12,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-11-21 18:58:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 18:58:12,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:12,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:12,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 18:58:13,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:58:13,090 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:13,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:13,090 INFO L85 PathProgramCache]: Analyzing trace with hash 434279669, now seen corresponding path program 1 times [2023-11-21 18:58:13,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:13,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887203486] [2023-11-21 18:58:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:13,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 18:58:13,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:13,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887203486] [2023-11-21 18:58:13,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887203486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:58:13,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894935679] [2023-11-21 18:58:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:13,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:58:13,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:58:13,211 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:58:13,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 18:58:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:13,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:58:13,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:58:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 18:58:13,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:58:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 18:58:13,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894935679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:58:13,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [367693086] [2023-11-21 18:58:13,420 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-21 18:58:13,420 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:58:13,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:58:13,420 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:58:13,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:58:14,905 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:58:17,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1458#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (exists ((|v_ULTIMATE.start_main_~new_data~0#1_53| Int) (|v_ULTIMATE.start_main_~i~0#1_99| Int)) (and (= |v_ULTIMATE.start_main_~i~0#1_99| 2) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~new_data~0#1_53| 3) (exists ((|v_#memory_int_136| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_126| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_79| Int) (|v_#memory_$Pointer$.offset_124| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_update_at_~head#1.base_81| Int)) (and (= (store |v_#memory_$Pointer$.base_126| |v_ULTIMATE.start_sll_update_at_~head#1.base_81| (store (select |v_#memory_$Pointer$.base_126| |v_ULTIMATE.start_sll_update_at_~head#1.base_81|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_update_at_~head#1.base_81|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79|))) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_124| |v_ULTIMATE.start_sll_update_at_~head#1.base_81| (store (select |v_#memory_$Pointer$.offset_124| |v_ULTIMATE.start_sll_update_at_~head#1.base_81|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_update_at_~head#1.base_81|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79|)))) (= |#memory_int| (store |v_#memory_int_136| |v_ULTIMATE.start_sll_update_at_~head#1.base_81| (store (select |v_#memory_int_136| |v_ULTIMATE.start_sll_update_at_~head#1.base_81|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79| (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_81|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79|)))) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_81|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79|) 3) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_sll_update_at_~head#1.base_81|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79|)))) (= |ULTIMATE.start_node_create_#res#1.offset| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_53|) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2023-11-21 18:58:17,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:58:17,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:58:17,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-21 18:58:17,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338705752] [2023-11-21 18:58:17,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:58:17,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 18:58:17,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:58:17,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 18:58:17,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-21 18:58:17,047 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:58:17,159 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-11-21 18:58:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:58:17,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-21 18:58:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:58:17,162 INFO L225 Difference]: With dead ends: 24 [2023-11-21 18:58:17,162 INFO L226 Difference]: Without dead ends: 21 [2023-11-21 18:58:17,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-21 18:58:17,163 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:58:17,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:58:17,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-21 18:58:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-21 18:58:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-21 18:58:17,172 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-11-21 18:58:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:58:17,172 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-21 18:58:17,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:58:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-21 18:58:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 18:58:17,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:58:17,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:58:17,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 18:58:17,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 18:58:17,374 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:58:17,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:58:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash 576115285, now seen corresponding path program 1 times [2023-11-21 18:58:17,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:58:17,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099766532] [2023-11-21 18:58:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:17,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:58:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:58:18,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:58:18,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099766532] [2023-11-21 18:58:18,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099766532] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:58:18,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931053665] [2023-11-21 18:58:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:58:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:58:18,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:58:18,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:58:18,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045234c9-e2ff-4a64-92e7-2231d15df21d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 18:58:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:58:19,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-21 18:58:19,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:58:19,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 18:58:19,328 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 18:58:19,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 18:58:19,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 18:58:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:58:19,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-21 18:58:19,765 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 18:58:19,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2023-11-21 18:58:19,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2023-11-21 18:58:19,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 23 [2023-11-21 18:58:20,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2023-11-21 18:58:20,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 18:58:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:58:20,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:58:20,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2023-11-21 18:58:20,340 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_726 (Array Int Int))) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_726) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) (= |c_ULTIMATE.start_sll_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| 1)) (forall ((v_ArrVal_728 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_728) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) is different from false [2023-11-21 18:58:20,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 18:58:20,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2023-11-21 18:58:20,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-21 18:58:20,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-21 18:58:20,794 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 18:58:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-21 18:58:20,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931053665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:58:20,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800134765] [2023-11-21 18:58:20,937 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-21 18:58:20,937 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:58:20,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:58:20,938 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:58:20,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs