./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:47:18,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:47:18,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:47:18,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:47:18,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:47:18,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:47:18,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:47:18,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:47:18,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:47:18,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:47:18,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:47:18,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:47:18,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:47:18,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:47:18,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:47:18,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:47:18,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:47:18,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:47:18,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:47:18,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:47:18,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:47:18,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:47:18,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:47:18,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:47:18,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:47:18,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:47:18,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:47:18,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:47:18,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:47:18,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:47:18,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:47:18,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:47:18,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:47:18,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:47:18,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:47:18,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:47:18,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:47:18,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:47:18,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:47:18,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:47:18,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:47:18,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:47:18,291 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:47:18,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:47:18,293 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:47:18,293 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:47:18,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:47:18,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:47:18,298 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:47:18,299 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:47:18,299 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:47:18,299 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:47:18,300 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:47:18,300 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:47:18,300 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:47:18,300 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:47:18,301 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:47:18,301 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:47:18,301 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:47:18,302 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:47:18,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:47:18,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:47:18,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:47:18,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:47:18,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:47:18,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:47:18,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:47:18,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:47:18,305 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:47:18,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:47:18,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:47:18,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:47:18,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:47:18,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:47:18,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:18,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:47:18,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:47:18,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:47:18,313 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:47:18,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:47:18,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:47:18,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:47:18,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:47:18,314 INFO L138 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_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 [2021-11-23 03:47:18,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:47:18,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:47:18,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:47:18,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:47:18,710 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:47:18,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-simple/dll2c_update_all.i [2021-11-23 03:47:18,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/data/b019e9d5b/bb59c0e5b7294cdc9a93a11841a63d33/FLAGdda0d1579 [2021-11-23 03:47:19,498 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:47:19,498 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/sv-benchmarks/c/list-simple/dll2c_update_all.i [2021-11-23 03:47:19,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/data/b019e9d5b/bb59c0e5b7294cdc9a93a11841a63d33/FLAGdda0d1579 [2021-11-23 03:47:19,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/data/b019e9d5b/bb59c0e5b7294cdc9a93a11841a63d33 [2021-11-23 03:47:19,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:47:19,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:47:19,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:19,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:47:19,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:47:19,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:19" (1/1) ... [2021-11-23 03:47:19,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ec57f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:19, skipping insertion in model container [2021-11-23 03:47:19,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:19" (1/1) ... [2021-11-23 03:47:19,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:47:19,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:47:20,250 WARN L230 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_c12a3408-7ade-4407-8983-dddd3ff7571a/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2021-11-23 03:47:20,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:20,285 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:47:20,396 WARN L230 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_c12a3408-7ade-4407-8983-dddd3ff7571a/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2021-11-23 03:47:20,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:20,446 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:47:20,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20 WrapperNode [2021-11-23 03:47:20,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:20,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:47:20,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:47:20,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:47:20,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (1/1) ... [2021-11-23 03:47:20,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (1/1) ... [2021-11-23 03:47:20,526 INFO L137 Inliner]: procedures = 126, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2021-11-23 03:47:20,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:47:20,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:47:20,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:47:20,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:47:20,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (1/1) ... [2021-11-23 03:47:20,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (1/1) ... [2021-11-23 03:47:20,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (1/1) ... [2021-11-23 03:47:20,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (1/1) ... [2021-11-23 03:47:20,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (1/1) ... [2021-11-23 03:47:20,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (1/1) ... [2021-11-23 03:47:20,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (1/1) ... [2021-11-23 03:47:20,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:47:20,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:47:20,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:47:20,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:47:20,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (1/1) ... [2021-11-23 03:47:20,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:20,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:20,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:47:20,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:47:20,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:47:20,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:47:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-23 03:47:20,678 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-23 03:47:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:47:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:47:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:47:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:47:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:47:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:47:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:47:20,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:47:20,848 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:47:20,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:47:21,149 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:47:21,239 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:47:21,242 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-23 03:47:21,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:21 BoogieIcfgContainer [2021-11-23 03:47:21,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:47:21,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:47:21,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:47:21,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:47:21,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:47:19" (1/3) ... [2021-11-23 03:47:21,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673d6e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:21, skipping insertion in model container [2021-11-23 03:47:21,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:20" (2/3) ... [2021-11-23 03:47:21,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673d6e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:21, skipping insertion in model container [2021-11-23 03:47:21,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:21" (3/3) ... [2021-11-23 03:47:21,262 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2021-11-23 03:47:21,270 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:47:21,270 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:47:21,334 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:47:21,343 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:47:21,347 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:47:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:47:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:47:21,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:21,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:21,379 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash 165599205, now seen corresponding path program 1 times [2021-11-23 03:47:21,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:21,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144598825] [2021-11-23 03:47:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:21,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:21,720 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:21,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144598825] [2021-11-23 03:47:21,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144598825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:21,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:21,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:47:21,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206521456] [2021-11-23 03:47:21,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:21,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:47:21,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:47:21,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:21,795 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:47:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:21,876 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2021-11-23 03:47:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:47:21,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-23 03:47:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:21,892 INFO L225 Difference]: With dead ends: 37 [2021-11-23 03:47:21,893 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 03:47:21,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:21,907 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:21,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:47:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 03:47:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-11-23 03:47:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:47:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-11-23 03:47:21,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2021-11-23 03:47:21,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:21,989 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-23 03:47:21,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:47:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-11-23 03:47:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:47:21,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:21,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:21,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:47:21,998 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:22,002 INFO L85 PathProgramCache]: Analyzing trace with hash 523554530, now seen corresponding path program 1 times [2021-11-23 03:47:22,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:22,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973587925] [2021-11-23 03:47:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:22,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:47:22,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:22,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973587925] [2021-11-23 03:47:22,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973587925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:22,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:22,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:47:22,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895284432] [2021-11-23 03:47:22,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:22,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:47:22,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:22,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:47:22,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:47:22,175 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:47:22,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:22,274 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-23 03:47:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:47:22,276 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-23 03:47:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:22,279 INFO L225 Difference]: With dead ends: 29 [2021-11-23 03:47:22,280 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 03:47:22,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:47:22,291 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:22,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:47:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 03:47:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2021-11-23 03:47:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:47:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-11-23 03:47:22,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 18 [2021-11-23 03:47:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:22,310 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-11-23 03:47:22,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:47:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-11-23 03:47:22,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:47:22,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:22,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:22,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:47:22,313 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:22,314 INFO L85 PathProgramCache]: Analyzing trace with hash 517856597, now seen corresponding path program 1 times [2021-11-23 03:47:22,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:22,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042008741] [2021-11-23 03:47:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:22,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:47:22,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042008741] [2021-11-23 03:47:22,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042008741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135591572] [2021-11-23 03:47:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:22,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:22,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:22,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:22,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:47:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:22,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:47:22,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:47:22,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:47:23,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135591572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:23,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1582576531] [2021-11-23 03:47:23,092 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:47:23,092 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:23,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:23,118 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:23,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:23,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:47:23,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:47:23,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 03:47:23,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:47:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:23,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:47:24,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 3 [2021-11-23 03:47:24,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:24,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:24,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:24,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 03:47:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:24,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 03:47:24,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:24,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:24,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:24,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:47:24,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:47:24,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:24,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:47:24,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:24,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:24,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:24,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:24,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:24,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:24,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:24,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2021-11-23 03:47:24,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:24,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:24,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:24,960 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:47:24,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 30 [2021-11-23 03:47:24,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:24,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:24,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:25,001 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:47:25,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-11-23 03:47:25,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 3 [2021-11-23 03:47:25,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:25,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 03:47:25,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:25,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:25,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 03:47:25,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:25,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:25,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:25,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:25,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:47:25,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:25,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:25,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:47:25,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:47:25,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:25,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:25,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:25,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:25,882 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:47:25,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 28 [2021-11-23 03:47:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:25,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:25,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-11-23 03:47:25,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:25,944 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:47:25,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-11-23 03:47:26,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 [2021-11-23 03:47:26,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:26,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 [2021-11-23 03:47:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 7 [2021-11-23 03:47:26,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:47:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-23 03:47:26,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:47:26,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:47:26,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-23 03:47:26,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:26,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 176 [2021-11-23 03:47:26,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:47:26,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 153 [2021-11-23 03:47:26,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:26,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:47:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 134 [2021-11-23 03:47:26,769 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2021-11-23 03:47:27,188 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:47:39,737 WARN L227 SmtUtils]: Spent 11.47s on a formula simplification. DAG size of input: 120 DAG size of output: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:47:41,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1582576531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:41,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:47:41,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5, 5] total 20 [2021-11-23 03:47:41,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060355300] [2021-11-23 03:47:41,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:41,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:47:41,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:47:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:47:41,878 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 12 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:47:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:42,130 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-11-23 03:47:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:47:42,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-23 03:47:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:42,133 INFO L225 Difference]: With dead ends: 25 [2021-11-23 03:47:42,133 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:47:42,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:47:42,135 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:42,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2021-11-23 03:47:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:47:42,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-23 03:47:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:47:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-11-23 03:47:42,145 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 20 [2021-11-23 03:47:42,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:42,146 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-11-23 03:47:42,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:47:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-11-23 03:47:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:47:42,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:42,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:42,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:42,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:42,363 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:42,363 INFO L85 PathProgramCache]: Analyzing trace with hash 250342324, now seen corresponding path program 1 times [2021-11-23 03:47:42,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:42,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038849665] [2021-11-23 03:47:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:42,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:47:42,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:42,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038849665] [2021-11-23 03:47:42,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038849665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:42,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:42,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:47:42,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496889768] [2021-11-23 03:47:42,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:42,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:47:42,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:42,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:47:42,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:47:42,467 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:47:42,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:42,553 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-11-23 03:47:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:47:42,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-11-23 03:47:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:42,555 INFO L225 Difference]: With dead ends: 34 [2021-11-23 03:47:42,555 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 03:47:42,559 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:47:42,561 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:42,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 33 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:47:42,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 03:47:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-11-23 03:47:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:47:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-11-23 03:47:42,575 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 21 [2021-11-23 03:47:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:42,576 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-11-23 03:47:42,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:47:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-11-23 03:47:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:47:42,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:42,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:42,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:47:42,578 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1993055135, now seen corresponding path program 2 times [2021-11-23 03:47:42,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:42,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143056450] [2021-11-23 03:47:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:42,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:43,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:43,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143056450] [2021-11-23 03:47:43,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143056450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:43,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026873329] [2021-11-23 03:47:43,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:47:43,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:43,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:43,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:43,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:47:43,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:47:43,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:47:43,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-23 03:47:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:43,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:47:44,076 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:47:44,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 03:47:44,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-23 03:47:44,350 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-23 03:47:44,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 43 [2021-11-23 03:47:44,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:44,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:44,561 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:47:44,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 49 [2021-11-23 03:47:44,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:47:44,791 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:47:44,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 24 [2021-11-23 03:47:44,872 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 03:47:44,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-11-23 03:47:44,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:47:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:44,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:51,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 132 treesize of output 126 [2021-11-23 03:47:51,596 INFO L354 Elim1Store]: treesize reduction 29, result has 48.2 percent of original size [2021-11-23 03:47:51,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 145 [2021-11-23 03:47:51,667 INFO L354 Elim1Store]: treesize reduction 17, result has 69.6 percent of original size [2021-11-23 03:47:51,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 149 [2021-11-23 03:47:51,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:47:51,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:47:51,888 INFO L354 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2021-11-23 03:47:51,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 35 treesize of output 49 [2021-11-23 03:47:51,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:47:51,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 47 [2021-11-23 03:47:51,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 4 [2021-11-23 03:47:51,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:51,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:51,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:47:51,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 35 [2021-11-23 03:47:52,085 INFO L354 Elim1Store]: treesize reduction 59, result has 38.5 percent of original size [2021-11-23 03:47:52,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 87 [2021-11-23 03:47:52,118 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-23 03:47:52,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 95 [2021-11-23 03:47:52,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 4 [2021-11-23 03:47:52,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-11-23 03:47:52,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:52,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:52,262 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-11-23 03:47:52,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 77 [2021-11-23 03:47:52,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:47:52,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 34 [2021-11-23 03:47:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:52,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026873329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:52,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [839143353] [2021-11-23 03:47:52,942 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:47:52,942 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:52,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:52,943 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:52,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:52,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:47:52,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:47:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:52,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:52,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:52,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:47:53,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:53,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:53,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:47:53,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:53,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:53,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 03:47:53,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:47:53,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:47:53,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:53,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:47:53,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:53,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:53,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:53,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:53,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:53,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 03:47:53,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 3 [2021-11-23 03:47:53,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:53,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 03:47:53,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:53,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:53,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:53,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:53,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:53,954 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:47:53,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 28 [2021-11-23 03:47:53,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:53,982 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:47:53,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-11-23 03:47:54,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-11-23 03:47:54,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:54,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:47:54,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:54,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:47:54,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:47:54,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:54,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:54,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:54,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:54,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:47:54,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:47:54,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:54,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:47:54,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:47:54,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:54,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:54,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:54,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:47:54,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,725 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:47:54,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-11-23 03:47:54,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,752 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:47:54,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 28 [2021-11-23 03:47:54,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-11-23 03:47:54,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 [2021-11-23 03:47:54,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 7 [2021-11-23 03:47:54,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:54,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 [2021-11-23 03:47:54,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:54,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:47:54,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-23 03:47:54,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:47:54,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:47:54,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:47:54,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-23 03:47:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:47:55,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 1 [2021-11-23 03:47:55,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:47:55,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 1 [2021-11-23 03:47:55,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:47:55,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 1 [2021-11-23 03:47:55,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 1 [2021-11-23 03:47:55,846 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2021-11-23 03:47:56,227 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:48:09,104 WARN L227 SmtUtils]: Spent 11.44s on a formula simplification. DAG size of input: 120 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:48:11,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '678#(and (<= |ULTIMATE.start_dll_circular_get_data_at_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_dll_circular_get_data_at_~index#1|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (= |ULTIMATE.start_dll_circular_get_data_at_~head#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)) |ULTIMATE.start_dll_circular_get_data_at_#res#1|))' at error location [2021-11-23 03:48:11,262 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:48:11,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:48:11,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 49 [2021-11-23 03:48:11,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109050024] [2021-11-23 03:48:11,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:48:11,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 03:48:11,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:11,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 03:48:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3647, Unknown=6, NotChecked=0, Total=3906 [2021-11-23 03:48:11,267 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 49 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 41 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:48:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:12,662 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-11-23 03:48:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:48:12,663 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 41 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 23 [2021-11-23 03:48:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:12,666 INFO L225 Difference]: With dead ends: 54 [2021-11-23 03:48:12,666 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 03:48:12,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=417, Invalid=5277, Unknown=6, NotChecked=0, Total=5700 [2021-11-23 03:48:12,670 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:12,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 215 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 525 Invalid, 0 Unknown, 296 Unchecked, 0.5s Time] [2021-11-23 03:48:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 03:48:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2021-11-23 03:48:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:48:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-11-23 03:48:12,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 23 [2021-11-23 03:48:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:12,690 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-11-23 03:48:12,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 41 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:48:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-11-23 03:48:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:48:12,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:12,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:12,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 03:48:12,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:12,908 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:12,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:12,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1657540567, now seen corresponding path program 1 times [2021-11-23 03:48:12,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:12,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428993480] [2021-11-23 03:48:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:12,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:48:12,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428993480] [2021-11-23 03:48:12,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428993480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:48:12,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:48:12,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:48:12,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234942332] [2021-11-23 03:48:12,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:48:12,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:48:12,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:48:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:48:12,984 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:48:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:13,053 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2021-11-23 03:48:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:48:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-23 03:48:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:13,055 INFO L225 Difference]: With dead ends: 47 [2021-11-23 03:48:13,055 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 03:48:13,056 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:48:13,057 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:13,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:48:13,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 03:48:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-11-23 03:48:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:48:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-11-23 03:48:13,073 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-11-23 03:48:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:13,074 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-11-23 03:48:13,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:48:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-11-23 03:48:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:48:13,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:13,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:13,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:48:13,076 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:13,077 INFO L85 PathProgramCache]: Analyzing trace with hash -278510040, now seen corresponding path program 3 times [2021-11-23 03:48:13,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:13,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893181379] [2021-11-23 03:48:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:13,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:48:13,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:13,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893181379] [2021-11-23 03:48:13,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893181379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:13,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291879596] [2021-11-23 03:48:13,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:48:13,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:13,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:13,153 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:13,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:48:13,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:48:13,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:48:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:48:13,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:48:13,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:48:13,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291879596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:48:13,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1838808025] [2021-11-23 03:48:13,369 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:48:13,369 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:48:13,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:48:13,369 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:48:13,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:48:13,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:48:13,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:48:13,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 03:48:13,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:48:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:48:13,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:13,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:13,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:13,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:13,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:13,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:13,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:13,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:13,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:13,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:13,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:13,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 351 treesize of output 335 [2021-11-23 03:48:13,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:13,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:13,932 INFO L354 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2021-11-23 03:48:13,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 338 treesize of output 331 [2021-11-23 03:48:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:13,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:13,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:13,987 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-23 03:48:13,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 397 treesize of output 275 [2021-11-23 03:48:14,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-11-23 03:48:14,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 03:48:14,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-11-23 03:48:14,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:14,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:14,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:14,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:14,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:14,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:14,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:14,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:14,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:14,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:14,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 351 treesize of output 335 [2021-11-23 03:48:14,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,513 INFO L354 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2021-11-23 03:48:14,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 338 treesize of output 331 [2021-11-23 03:48:14,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,591 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-23 03:48:14,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 397 treesize of output 275 [2021-11-23 03:48:14,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 13 [2021-11-23 03:48:14,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-11-23 03:48:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2021-11-23 03:48:14,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 [2021-11-23 03:48:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 7 [2021-11-23 03:48:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 [2021-11-23 03:48:14,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:48:14,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:48:14,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-23 03:48:14,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:14,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:14,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:48:14,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-23 03:48:15,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:48:15,202 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-11-23 03:48:15,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 151 [2021-11-23 03:48:15,245 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-11-23 03:48:15,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 145 [2021-11-23 03:48:15,543 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 84 for LOIs [2021-11-23 03:48:15,858 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:48:27,989 WARN L227 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 124 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:48:29,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1167#(and (<= |ULTIMATE.start_dll_circular_get_data_at_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_dll_circular_get_data_at_~index#1|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (= |ULTIMATE.start_dll_circular_get_data_at_~head#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)) |ULTIMATE.start_dll_circular_get_data_at_#res#1|))' at error location [2021-11-23 03:48:29,885 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:48:29,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:48:29,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2021-11-23 03:48:29,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970432918] [2021-11-23 03:48:29,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:48:29,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:48:29,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:29,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:48:29,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:48:29,889 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:48:30,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:30,041 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-11-23 03:48:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:48:30,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-23 03:48:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:30,043 INFO L225 Difference]: With dead ends: 58 [2021-11-23 03:48:30,043 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 03:48:30,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:48:30,045 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:30,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:48:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 03:48:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-11-23 03:48:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:48:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-11-23 03:48:30,064 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2021-11-23 03:48:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:30,064 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-11-23 03:48:30,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:48:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-11-23 03:48:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:48:30,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:30,066 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:30,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:48:30,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:48:30,280 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1824430642, now seen corresponding path program 4 times [2021-11-23 03:48:30,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:30,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781862205] [2021-11-23 03:48:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:30,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:48:30,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:30,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781862205] [2021-11-23 03:48:30,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781862205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:30,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177586122] [2021-11-23 03:48:30,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:48:30,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:30,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:30,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:30,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:48:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:30,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:48:30,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:48:30,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:48:30,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177586122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:48:30,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1379136472] [2021-11-23 03:48:30,594 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:48:30,594 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:48:30,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:48:30,595 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:48:30,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:48:30,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:48:30,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:48:30,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:30,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:30,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:30,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:48:30,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:30,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:30,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:30,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:48:30,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:30,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:30,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:30,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 03:48:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:30,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:30,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:30,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:30,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:30,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:30,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:30,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:30,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:30,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,024 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:48:31,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-11-23 03:48:31,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-11-23 03:48:31,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,071 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:48:31,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 28 [2021-11-23 03:48:31,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:31,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:31,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:31,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:31,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:31,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:31,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:31,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:31,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:31,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:31,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:31,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 351 treesize of output 335 [2021-11-23 03:48:31,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:31,471 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-23 03:48:31,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 338 treesize of output 327 [2021-11-23 03:48:31,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:31,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:31,535 INFO L354 Elim1Store]: treesize reduction 74, result has 22.1 percent of original size [2021-11-23 03:48:31,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 381 treesize of output 271 [2021-11-23 03:48:31,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 13 [2021-11-23 03:48:31,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2021-11-23 03:48:31,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 60 [2021-11-23 03:48:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 [2021-11-23 03:48:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 7 [2021-11-23 03:48:31,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 [2021-11-23 03:48:31,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:31,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:48:31,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-23 03:48:31,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:31,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:31,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:48:31,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-23 03:48:31,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:48:32,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 1 [2021-11-23 03:48:32,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 1 [2021-11-23 03:48:32,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:48:32,297 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2021-11-23 03:48:32,649 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:48:44,293 WARN L227 SmtUtils]: Spent 10.60s on a formula simplification. DAG size of input: 120 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:48:46,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1507#(and (<= |ULTIMATE.start_dll_circular_get_data_at_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_dll_circular_get_data_at_~index#1|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (= |ULTIMATE.start_dll_circular_get_data_at_~head#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)) |ULTIMATE.start_dll_circular_get_data_at_#res#1|))' at error location [2021-11-23 03:48:46,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:48:46,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:48:46,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-11-23 03:48:46,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436446822] [2021-11-23 03:48:46,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:48:46,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:48:46,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:48:46,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:48:46,174 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:48:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:46,282 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-11-23 03:48:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:48:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-23 03:48:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:46,284 INFO L225 Difference]: With dead ends: 54 [2021-11-23 03:48:46,284 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 03:48:46,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:48:46,286 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:46,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 43 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:48:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 03:48:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-11-23 03:48:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:48:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-11-23 03:48:46,304 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 25 [2021-11-23 03:48:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:46,304 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-11-23 03:48:46,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:48:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-11-23 03:48:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:48:46,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:46,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:46,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:48:46,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:46,523 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash 880931285, now seen corresponding path program 5 times [2021-11-23 03:48:46,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:46,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582927738] [2021-11-23 03:48:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:46,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:48:46,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:46,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582927738] [2021-11-23 03:48:46,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582927738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:46,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520626520] [2021-11-23 03:48:46,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:48:46,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:46,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:46,652 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:46,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:48:47,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:48:47,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:48:47,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:48:47,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:48:47,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:48:47,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520626520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:48:47,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:48:47,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-23 03:48:47,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372006065] [2021-11-23 03:48:47,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:48:47,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:48:47,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:48:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:48:47,256 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:48:47,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:47,327 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-11-23 03:48:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:48:47,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-23 03:48:47,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:47,329 INFO L225 Difference]: With dead ends: 52 [2021-11-23 03:48:47,329 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 03:48:47,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:48:47,330 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:47,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:48:47,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 03:48:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-11-23 03:48:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:48:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-23 03:48:47,347 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2021-11-23 03:48:47,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:47,347 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-23 03:48:47,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:48:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-23 03:48:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:48:47,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:47,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:47,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:48:47,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:47,552 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:47,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:47,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1431804676, now seen corresponding path program 1 times [2021-11-23 03:48:47,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:47,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708402083] [2021-11-23 03:48:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:47,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:48:47,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:47,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708402083] [2021-11-23 03:48:47,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708402083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:48:47,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620419674] [2021-11-23 03:48:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:47,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:47,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:47,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:48:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:47,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:48:47,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:48:47,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:48:47,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620419674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:48:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1558095906] [2021-11-23 03:48:47,851 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:48:47,851 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:48:47,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:48:47,852 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:48:47,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:48:47,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:48:47,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:48:47,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:47,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:47,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 03:48:47,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:47,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:47,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:47,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:48:47,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:47,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:47,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:47,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:48:48,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:48,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:48,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:48,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:48,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:48,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:48,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:48,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:48,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:48,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:48,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-11-23 03:48:48,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 03:48:48,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:48,311 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:48:48,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 36 [2021-11-23 03:48:48,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:48,340 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 03:48:48,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 32 [2021-11-23 03:48:48,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:48,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:48,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:48,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:48,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:48,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:48,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:48:48,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:48,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 03:48:48,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:48:48,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:48,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 351 treesize of output 335 [2021-11-23 03:48:48,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:48,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:48,741 INFO L354 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2021-11-23 03:48:48,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 338 treesize of output 331 [2021-11-23 03:48:48,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:48,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:48,795 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-23 03:48:48,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 397 treesize of output 275 [2021-11-23 03:48:48,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 13 [2021-11-23 03:48:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-23 03:48:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 60 [2021-11-23 03:48:48,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:48,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 [2021-11-23 03:48:49,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:49,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 7 [2021-11-23 03:48:49,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:49,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 [2021-11-23 03:48:49,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:48:49,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:49,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:49,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:49,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:49,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:48:49,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-23 03:48:49,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:48:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:49,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:49,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:48:49,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:48:49,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-23 03:48:49,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 1 [2021-11-23 03:48:49,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 1 [2021-11-23 03:48:49,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-23 03:48:49,709 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 84 for LOIs [2021-11-23 03:48:50,075 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:49:02,361 WARN L227 SmtUtils]: Spent 11.46s on a formula simplification. DAG size of input: 124 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:49:03,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2081#(and (<= |ULTIMATE.start_dll_circular_get_data_at_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (<= 0 |ULTIMATE.start_dll_circular_get_data_at_#in~index#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_get_data_at_~index#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= 0 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset| 0) (<= |ULTIMATE.start_dll_circular_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)) |ULTIMATE.start_dll_circular_get_data_at_#res#1|) (<= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| 0))' at error location [2021-11-23 03:49:03,798 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:49:03,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:49:03,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-11-23 03:49:03,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010658664] [2021-11-23 03:49:03,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:49:03,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:49:03,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:49:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:49:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:49:03,801 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:49:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:49:03,885 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-11-23 03:49:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:49:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-23 03:49:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:49:03,887 INFO L225 Difference]: With dead ends: 45 [2021-11-23 03:49:03,887 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 03:49:03,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:49:03,889 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:49:03,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 50 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:49:03,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 03:49:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-11-23 03:49:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:49:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-23 03:49:03,904 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2021-11-23 03:49:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:49:03,905 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-23 03:49:03,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:49:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-23 03:49:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:49:03,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:49:03,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:49:03,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:49:04,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:49:04,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:49:04,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:49:04,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1438645522, now seen corresponding path program 1 times [2021-11-23 03:49:04,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:49:04,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689803667] [2021-11-23 03:49:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:49:04,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:49:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:49:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:49:04,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:49:04,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689803667] [2021-11-23 03:49:04,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689803667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:49:04,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612388801] [2021-11-23 03:49:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:49:04,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:49:04,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:49:04,981 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:49:05,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12a3408-7ade-4407-8983-dddd3ff7571a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:49:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:49:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-23 03:49:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:49:05,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:49:05,285 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:49:05,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 03:49:05,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2021-11-23 03:49:05,472 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-11-23 03:49:05,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 77 treesize of output 45 [2021-11-23 03:49:05,714 INFO L354 Elim1Store]: treesize reduction 120, result has 16.7 percent of original size [2021-11-23 03:49:05,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 44 [2021-11-23 03:49:06,025 INFO L354 Elim1Store]: treesize reduction 229, result has 13.9 percent of original size [2021-11-23 03:49:06,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 146 treesize of output 126 [2021-11-23 03:49:06,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 117 treesize of output 109 [2021-11-23 03:49:06,061 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-23 03:49:06,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 109 treesize of output 95 [2021-11-23 03:49:06,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:49:06,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2021-11-23 03:49:06,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 21 [2021-11-23 03:49:06,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 11 [2021-11-23 03:49:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:49:06,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:49:07,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 174 treesize of output 146 [2021-11-23 03:49:07,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:49:07,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 56 treesize of output 47 [2021-11-23 03:49:07,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 29 [2021-11-23 03:49:09,808 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_54| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_54| |c_ULTIMATE.start_main_~s~0#1.offset|) (and (< |c_ULTIMATE.start_main_~i~0#1| 1) (<= 0 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_DerPreprocessor_37 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_54| 8) v_DerPreprocessor_37) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|)))))) is different from false [2021-11-23 03:49:16,034 INFO L354 Elim1Store]: treesize reduction 29, result has 48.2 percent of original size [2021-11-23 03:49:16,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 148 [2021-11-23 03:49:16,077 INFO L354 Elim1Store]: treesize reduction 17, result has 69.6 percent of original size [2021-11-23 03:49:16,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 152 [2021-11-23 03:49:16,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:49:16,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:49:16,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 46 [2021-11-23 03:49:16,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 33