./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.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_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/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_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/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_d3a41197-aba6-469a-a44b-3f164a25bdce/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 4fb6aa6206205a747f158782e93b3c9333c1a2cdc4e8dab70046fca960e31961 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:45:59,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:45:59,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:46:00,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:46:00,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:46:00,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:46:00,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:46:00,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:46:00,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:46:00,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:46:00,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:46:00,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:46:00,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:46:00,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:46:00,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:46:00,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:46:00,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:46:00,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:46:00,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:46:00,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:46:00,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:46:00,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:46:00,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:46:00,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:46:00,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:46:00,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:46:00,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:46:00,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:46:00,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:46:00,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:46:00,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:46:00,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:46:00,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:46:00,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:46:00,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:46:00,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:46:00,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:46:00,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:46:00,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:46:00,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:46:00,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:46:00,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:46:00,108 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:46:00,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:46:00,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:46:00,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:46:00,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:46:00,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:46:00,112 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:46:00,112 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:46:00,113 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:46:00,113 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:46:00,113 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:46:00,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:46:00,114 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:46:00,114 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:46:00,115 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:46:00,115 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:46:00,122 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:46:00,122 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:46:00,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:46:00,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:46:00,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:46:00,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:46:00,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:46:00,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:46:00,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:46:00,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:46:00,135 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:46:00,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:46:00,137 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:46:00,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:46:00,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:46:00,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:46:00,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:00,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:46:00,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:46:00,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:46:00,142 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:46:00,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:46:00,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:46:00,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:46:00,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:46:00,144 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_d3a41197-aba6-469a-a44b-3f164a25bdce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fb6aa6206205a747f158782e93b3c9333c1a2cdc4e8dab70046fca960e31961 [2021-11-23 02:46:00,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:46:00,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:46:00,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:46:00,494 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:46:00,494 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:46:00,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2021-11-23 02:46:00,587 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/data/37bb3ab1d/acd1414731734eaea453564b3b41939e/FLAG11a01c937 [2021-11-23 02:46:01,160 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:46:01,161 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2021-11-23 02:46:01,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/data/37bb3ab1d/acd1414731734eaea453564b3b41939e/FLAG11a01c937 [2021-11-23 02:46:01,476 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/data/37bb3ab1d/acd1414731734eaea453564b3b41939e [2021-11-23 02:46:01,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:46:01,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:46:01,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:01,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:46:01,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:46:01,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:01" (1/1) ... [2021-11-23 02:46:01,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d61e55f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:01, skipping insertion in model container [2021-11-23 02:46:01,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:01" (1/1) ... [2021-11-23 02:46:01,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:46:01,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:46:02,011 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_d3a41197-aba6-469a-a44b-3f164a25bdce/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2021-11-23 02:46:02,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:02,038 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:46:02,113 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_d3a41197-aba6-469a-a44b-3f164a25bdce/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2021-11-23 02:46:02,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:02,163 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:46:02,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02 WrapperNode [2021-11-23 02:46:02,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:02,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:02,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:46:02,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:46:02,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (1/1) ... [2021-11-23 02:46:02,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (1/1) ... [2021-11-23 02:46:02,259 INFO L137 Inliner]: procedures = 122, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2021-11-23 02:46:02,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:02,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:46:02,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:46:02,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:46:02,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (1/1) ... [2021-11-23 02:46:02,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (1/1) ... [2021-11-23 02:46:02,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (1/1) ... [2021-11-23 02:46:02,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (1/1) ... [2021-11-23 02:46:02,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (1/1) ... [2021-11-23 02:46:02,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (1/1) ... [2021-11-23 02:46:02,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (1/1) ... [2021-11-23 02:46:02,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:46:02,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:46:02,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:46:02,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:46:02,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (1/1) ... [2021-11-23 02:46:02,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:02,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:46:02,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:46:02,444 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-23 02:46:02,444 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-23 02:46:02,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:46:02,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:46:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:46:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:46:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:46:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:46:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:46:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:46:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:46:02,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:46:02,600 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:46:02,603 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:46:02,644 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-23 02:46:02,890 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:46:02,938 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:46:02,938 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:46:02,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:02 BoogieIcfgContainer [2021-11-23 02:46:02,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:46:02,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:46:02,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:46:02,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:46:02,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:46:01" (1/3) ... [2021-11-23 02:46:02,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2375a554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:02, skipping insertion in model container [2021-11-23 02:46:02,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:02" (2/3) ... [2021-11-23 02:46:02,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2375a554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:02, skipping insertion in model container [2021-11-23 02:46:02,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:02" (3/3) ... [2021-11-23 02:46:02,953 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2021-11-23 02:46:02,968 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:46:02,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:46:03,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:46:03,058 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 02:46:03,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:46:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:03,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:46:03,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:03,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:03,086 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:03,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1372459767, now seen corresponding path program 1 times [2021-11-23 02:46:03,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:03,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684517610] [2021-11-23 02:46:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:03,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:03,402 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 02:46:03,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:03,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684517610] [2021-11-23 02:46:03,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684517610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:03,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:03,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:46:03,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76364429] [2021-11-23 02:46:03,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:03,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:03,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:03,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:03,453 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:03,509 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-11-23 02:46:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:03,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:46:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:03,520 INFO L225 Difference]: With dead ends: 38 [2021-11-23 02:46:03,520 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 02:46:03,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:03,529 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:03,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 41 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:46:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 02:46:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-11-23 02:46:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-23 02:46:03,564 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2021-11-23 02:46:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:03,565 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-23 02:46:03,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-23 02:46:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:46:03,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:03,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:03,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:46:03,567 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:03,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1451408273, now seen corresponding path program 1 times [2021-11-23 02:46:03,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:03,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077207105] [2021-11-23 02:46:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:03,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:03,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077207105] [2021-11-23 02:46:03,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077207105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:46:03,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320952951] [2021-11-23 02:46:03,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:03,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:03,686 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:03,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:46:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:03,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:46:03,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:03,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:03,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320952951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:46:03,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79905815] [2021-11-23 02:46:03,967 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:46:03,969 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:46:03,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:46:03,986 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:46:03,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:46:04,218 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-23 02:46:04,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-23 02:46:04,304 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 02:46:04,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-23 02:46:04,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 46 [2021-11-23 02:46:04,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-11-23 02:46:04,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-11-23 02:46:04,634 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 02:46:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-11-23 02:46:04,738 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:46:04,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:46:04,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 41 [2021-11-23 02:46:04,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2021-11-23 02:46:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-23 02:46:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:04,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:05,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2021-11-23 02:46:05,157 INFO L354 Elim1Store]: treesize reduction 48, result has 37.7 percent of original size [2021-11-23 02:46:05,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 46 [2021-11-23 02:46:05,284 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-23 02:46:05,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 65 [2021-11-23 02:46:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:05,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:05,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:05,672 INFO L354 Elim1Store]: treesize reduction 115, result has 10.2 percent of original size [2021-11-23 02:46:05,673 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 563 treesize of output 544 [2021-11-23 02:46:05,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:05,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:05,965 INFO L354 Elim1Store]: treesize reduction 342, result has 10.9 percent of original size [2021-11-23 02:46:05,966 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 4 new quantified variables, introduced 10 case distinctions, treesize of input 544 treesize of output 516 [2021-11-23 02:46:05,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:06,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:06,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:06,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:06,095 INFO L354 Elim1Store]: treesize reduction 108, result has 13.6 percent of original size [2021-11-23 02:46:06,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 516 treesize of output 481 [2021-11-23 02:46:06,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:06,234 INFO L354 Elim1Store]: treesize reduction 156, result has 18.3 percent of original size [2021-11-23 02:46:06,235 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 520 treesize of output 480 [2021-11-23 02:46:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:06,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:06,348 INFO L354 Elim1Store]: treesize reduction 180, result has 12.2 percent of original size [2021-11-23 02:46:06,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 516 treesize of output 502 [2021-11-23 02:46:06,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:06,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:06,482 INFO L354 Elim1Store]: treesize reduction 264, result has 15.1 percent of original size [2021-11-23 02:46:06,483 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 592 treesize of output 505 [2021-11-23 02:46:06,853 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 02:46:06,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 535 treesize of output 541 [2021-11-23 02:46:07,056 INFO L354 Elim1Store]: treesize reduction 242, result has 17.1 percent of original size [2021-11-23 02:46:07,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 534 treesize of output 557 [2021-11-23 02:46:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:07,363 INFO L354 Elim1Store]: treesize reduction 54, result has 40.7 percent of original size [2021-11-23 02:46:07,363 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 2 case distinctions, treesize of input 112 treesize of output 103 [2021-11-23 02:46:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:07,424 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-11-23 02:46:07,424 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 2 case distinctions, treesize of input 109 treesize of output 105 [2021-11-23 02:46:07,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:07,436 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 132 treesize of output 121 [2021-11-23 02:46:07,477 INFO L354 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2021-11-23 02:46:07,478 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 142 treesize of output 130 [2021-11-23 02:46:07,568 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 02:46:07,580 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 02:46:07,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:07,736 INFO L354 Elim1Store]: treesize reduction 54, result has 40.7 percent of original size [2021-11-23 02:46:07,736 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 2 case distinctions, treesize of input 112 treesize of output 103 [2021-11-23 02:46:07,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:07,748 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 103 treesize of output 92 [2021-11-23 02:46:07,790 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-23 02:46:07,790 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 107 treesize of output 101 [2021-11-23 02:46:07,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:07,850 INFO L354 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2021-11-23 02:46:07,851 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 2 case distinctions, treesize of input 100 treesize of output 94 [2021-11-23 02:46:07,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:07,971 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 33 treesize of output 19 [2021-11-23 02:46:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:08,001 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 39 treesize of output 9 [2021-11-23 02:46:08,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:08,019 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 33 treesize of output 19 [2021-11-23 02:46:08,109 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 02:46:08,119 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 02:46:08,154 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:46:09,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '162#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4))) (= |ULTIMATE.start_main_~data_new~0#1| 1) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_main_~data_init~0#1|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 5) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~data_init~0#1| 1) (<= |#NULL.offset| 0) (<= 5 |ULTIMATE.start_main_~len~0#1|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start_main_~ptr~0#1.offset|) (not (= |ULTIMATE.start_main_~data_init~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (<= |ULTIMATE.start_main_~len~0#1| 5) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= 5 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~ptr~0#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|))' at error location [2021-11-23 02:46:09,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:46:09,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:46:09,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-23 02:46:09,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096417525] [2021-11-23 02:46:09,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:46:09,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:46:09,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:46:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:46:09,311 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:09,364 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-11-23 02:46:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:46:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 02:46:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:09,367 INFO L225 Difference]: With dead ends: 34 [2021-11-23 02:46:09,367 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 02:46:09,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:46:09,369 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:09,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:46:09,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 02:46:09,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 02:46:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-23 02:46:09,376 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2021-11-23 02:46:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:09,377 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-23 02:46:09,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-23 02:46:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:46:09,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:09,379 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:09,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:09,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:09,600 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:09,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2044865783, now seen corresponding path program 2 times [2021-11-23 02:46:09,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:09,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226883469] [2021-11-23 02:46:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:09,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:10,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:10,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226883469] [2021-11-23 02:46:10,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226883469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:46:10,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020716604] [2021-11-23 02:46:10,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:46:10,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:10,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:10,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:10,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:46:10,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 02:46:10,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:46:10,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 02:46:10,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:10,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:46:10,672 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:46:10,672 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 11 treesize of output 11 [2021-11-23 02:46:10,776 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-23 02:46:10,777 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 1 case distinctions, treesize of input 40 treesize of output 12 [2021-11-23 02:46:10,879 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-23 02:46:10,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 31 [2021-11-23 02:46:10,938 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 02:46:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:46:10,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:12,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_11 Int) (v_DerPreprocessor_12 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= |c_ULTIMATE.start_main_~data_init~0#1| (select (store (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_DerPreprocessor_12)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8) v_DerPreprocessor_11) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2021-11-23 02:46:12,186 INFO L354 Elim1Store]: treesize reduction 68, result has 48.5 percent of original size [2021-11-23 02:46:12,187 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 76 [2021-11-23 02:46:12,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:46:12,200 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 66 treesize of output 68 [2021-11-23 02:46:12,276 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 39 treesize of output 35 [2021-11-23 02:46:12,569 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 24 treesize of output 22 [2021-11-23 02:46:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 4 not checked. [2021-11-23 02:46:12,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020716604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:46:12,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018815533] [2021-11-23 02:46:12,651 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:46:12,651 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:46:12,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:46:12,656 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:46:12,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:46:12,716 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 02:46:12,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-23 02:46:12,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 02:46:12,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:12,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:12,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:12,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-11-23 02:46:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:12,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:12,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:12,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-11-23 02:46:12,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:12,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:12,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:12,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 46 [2021-11-23 02:46:12,920 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-23 02:46:12,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-11-23 02:46:12,996 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:46:12,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:46:13,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2021-11-23 02:46:13,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2021-11-23 02:46:13,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-23 02:46:13,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2021-11-23 02:46:13,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-23 02:46:13,282 INFO L354 Elim1Store]: treesize reduction 90, result has 35.3 percent of original size [2021-11-23 02:46:13,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 77 [2021-11-23 02:46:13,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 44 [2021-11-23 02:46:13,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:13,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,647 INFO L354 Elim1Store]: treesize reduction 126, result has 13.1 percent of original size [2021-11-23 02:46:13,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 611 treesize of output 534 [2021-11-23 02:46:13,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:13,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,946 INFO L354 Elim1Store]: treesize reduction 188, result has 17.9 percent of original size [2021-11-23 02:46:13,947 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 645 treesize of output 537 [2021-11-23 02:46:13,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:13,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:14,093 INFO L354 Elim1Store]: treesize reduction 126, result has 13.1 percent of original size [2021-11-23 02:46:14,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 576 treesize of output 562 [2021-11-23 02:46:14,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:14,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:14,242 INFO L354 Elim1Store]: treesize reduction 212, result has 14.2 percent of original size [2021-11-23 02:46:14,242 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 628 treesize of output 558 [2021-11-23 02:46:14,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:14,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:14,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:14,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:14,313 INFO L354 Elim1Store]: treesize reduction 115, result has 10.2 percent of original size [2021-11-23 02:46:14,314 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 618 treesize of output 599 [2021-11-23 02:46:14,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:14,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:14,502 INFO L354 Elim1Store]: treesize reduction 570, result has 6.9 percent of original size [2021-11-23 02:46:14,503 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 4 new quantified variables, introduced 10 case distinctions, treesize of input 599 treesize of output 541 [2021-11-23 02:46:14,833 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 02:46:14,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 535 treesize of output 541 [2021-11-23 02:46:15,024 INFO L354 Elim1Store]: treesize reduction 242, result has 17.1 percent of original size [2021-11-23 02:46:15,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 534 treesize of output 557 [2021-11-23 02:46:15,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:15,318 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-11-23 02:46:15,318 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 2 case distinctions, treesize of input 166 treesize of output 137 [2021-11-23 02:46:15,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:15,333 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 128 treesize of output 117 [2021-11-23 02:46:15,369 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-23 02:46:15,370 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 138 treesize of output 116 [2021-11-23 02:46:15,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:15,433 INFO L354 Elim1Store]: treesize reduction 86, result has 16.5 percent of original size [2021-11-23 02:46:15,433 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 2 case distinctions, treesize of input 134 treesize of output 120 [2021-11-23 02:46:15,493 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 02:46:15,512 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 02:46:15,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:15,624 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-11-23 02:46:15,625 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 2 case distinctions, treesize of input 160 treesize of output 131 [2021-11-23 02:46:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:15,636 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 122 treesize of output 111 [2021-11-23 02:46:15,668 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-23 02:46:15,669 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 132 treesize of output 110 [2021-11-23 02:46:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:15,681 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 128 treesize of output 117 [2021-11-23 02:46:15,706 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-23 02:46:15,707 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 126 treesize of output 116 [2021-11-23 02:46:15,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:15,798 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 39 treesize of output 9 [2021-11-23 02:46:15,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:15,811 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 33 treesize of output 19 [2021-11-23 02:46:15,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:15,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:15,827 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 33 treesize of output 19 [2021-11-23 02:46:15,925 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 02:46:15,934 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 02:46:15,964 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:46:17,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '379#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4))) (= |ULTIMATE.start_main_~data_new~0#1| 1) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_main_~data_init~0#1|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 5) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~data_init~0#1| 1) (<= |#NULL.offset| 0) (<= 5 |ULTIMATE.start_main_~len~0#1|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start_main_~ptr~0#1.offset|) (not (= |ULTIMATE.start_main_~data_init~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (<= |ULTIMATE.start_main_~len~0#1| 5) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= |#NULL.base| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= 5 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~ptr~0#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|))' at error location [2021-11-23 02:46:17,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:46:17,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:46:17,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2021-11-23 02:46:17,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839643715] [2021-11-23 02:46:17,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:46:17,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 02:46:17,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:17,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 02:46:17,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=769, Unknown=1, NotChecked=56, Total=930 [2021-11-23 02:46:17,316 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:18,770 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (forall ((v_DerPreprocessor_11 Int) (v_DerPreprocessor_12 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= |c_ULTIMATE.start_main_~data_init~0#1| (select (store (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_DerPreprocessor_12)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8) v_DerPreprocessor_11) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |c_ULTIMATE.start_main_~data_init~0#1| (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) is different from false [2021-11-23 02:46:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:18,905 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-11-23 02:46:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:46:18,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 02:46:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:18,906 INFO L225 Difference]: With dead ends: 29 [2021-11-23 02:46:18,906 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 02:46:18,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=161, Invalid=1035, Unknown=2, NotChecked=134, Total=1332 [2021-11-23 02:46:18,910 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:18,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 121 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2021-11-23 02:46:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 02:46:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 02:46:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-11-23 02:46:18,918 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2021-11-23 02:46:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:18,918 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-11-23 02:46:18,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-11-23 02:46:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 02:46:18,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:18,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:18,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 02:46:19,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 02:46:19,132 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1220729213, now seen corresponding path program 1 times [2021-11-23 02:46:19,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:19,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020287308] [2021-11-23 02:46:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:19,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:19,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:19,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020287308] [2021-11-23 02:46:19,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020287308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:46:19,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289931548] [2021-11-23 02:46:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:19,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:19,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:19,872 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:19,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3a41197-aba6-469a-a44b-3f164a25bdce/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:46:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:19,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 02:46:19,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:19,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:46:20,082 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:46:20,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-23 02:46:20,226 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-23 02:46:20,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-23 02:46:20,482 INFO L354 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2021-11-23 02:46:20,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 53 [2021-11-23 02:46:20,712 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-23 02:46:20,713 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 1 case distinctions, treesize of input 66 treesize of output 38 [2021-11-23 02:46:20,905 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-23 02:46:20,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 case distinctions, treesize of input 46 treesize of output 52 [2021-11-23 02:46:21,068 INFO L354 Elim1Store]: treesize reduction 150, result has 13.8 percent of original size [2021-11-23 02:46:21,069 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 3 case distinctions, treesize of input 119 treesize of output 97 [2021-11-23 02:46:21,100 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 02:46:21,100 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 1 case distinctions, treesize of input 85 treesize of output 74 [2021-11-23 02:46:21,116 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-23 02:46:21,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 73 [2021-11-23 02:46:21,154 INFO L354 Elim1Store]: treesize reduction 114, result has 13.0 percent of original size [2021-11-23 02:46:21,155 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 2 case distinctions, treesize of input 103 treesize of output 83 [2021-11-23 02:46:21,348 INFO L354 Elim1Store]: treesize reduction 226, result has 12.4 percent of original size [2021-11-23 02:46:21,349 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 184 treesize of output 175 [2021-11-23 02:46:21,411 INFO L354 Elim1Store]: treesize reduction 270, result has 11.8 percent of original size [2021-11-23 02:46:21,411 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 161 [2021-11-23 02:46:21,471 INFO L354 Elim1Store]: treesize reduction 220, result has 12.7 percent of original size [2021-11-23 02:46:21,472 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 140 treesize of output 104 [2021-11-23 02:46:21,737 INFO L354 Elim1Store]: treesize reduction 236, result has 14.8 percent of original size [2021-11-23 02:46:21,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 193 treesize of output 154 [2021-11-23 02:46:21,754 INFO L354 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2021-11-23 02:46:21,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 279 treesize of output 148 [2021-11-23 02:46:21,778 INFO L354 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2021-11-23 02:46:21,779 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 109 [2021-11-23 02:46:21,794 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:46:21,794 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 76 treesize of output 58 [2021-11-23 02:46:21,801 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-23 02:46:21,801 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 66 treesize of output 48 [2021-11-23 02:46:21,805 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 45 treesize of output 41 [2021-11-23 02:46:21,808 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 36 treesize of output 28 [2021-11-23 02:46:21,873 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 02:46:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:21,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:31,336 INFO L354 Elim1Store]: treesize reduction 200, result has 26.5 percent of original size [2021-11-23 02:46:31,337 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 346 treesize of output 335 [2021-11-23 02:46:31,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:46:31,496 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 335 treesize of output 349 [2021-11-23 02:46:31,980 INFO L354 Elim1Store]: treesize reduction 189, result has 30.5 percent of original size [2021-11-23 02:46:31,980 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 380 treesize of output 380 [2021-11-23 02:46:32,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:46:32,092 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 586 treesize of output 530 [2021-11-23 02:46:32,389 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 339 treesize of output 231 [2021-11-23 02:46:32,657 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 341 treesize of output 233 [2021-11-23 02:46:33,408 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-23 02:46:33,408 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 2504 treesize of output 1702 [2021-11-23 02:46:33,496 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-23 02:46:33,496 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 2504 treesize of output 1702 [2021-11-23 02:46:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:33,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:33,535 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 231 treesize of output 223 [2021-11-23 02:46:33,587 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 12 treesize of output 8 [2021-11-23 02:46:33,671 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-11-23 02:46:33,671 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 2506 treesize of output 1714 [2021-11-23 02:46:33,784 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 12 treesize of output 8 [2021-11-23 02:46:33,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:46:33,929 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 2540 treesize of output 1754 [2021-11-23 02:46:34,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:34,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:34,675 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 301 treesize of output 285 [2021-11-23 02:46:35,051 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-11-23 02:46:35,051 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 1544 treesize of output 1074 [2021-11-23 02:46:35,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:35,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:35,719 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 301 treesize of output 285 [2021-11-23 02:46:35,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:46:35,793 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 2792 treesize of output 1912 [2021-11-23 02:46:43,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 02:46:43,816 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 02:46:43,816 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 17 treesize of output 9 [2021-11-23 02:46:43,865 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 02:48:48,316 WARN L227 SmtUtils]: Spent 2.07m on a formula simplification that was a NOOP. DAG size: 55 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:48:48,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:48:48,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 10505 treesize of output 10557