./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/functions_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/functions_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH --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 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:32:28,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:32:28,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:32:28,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:32:28,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:32:28,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:32:28,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:32:28,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:32:28,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:32:28,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:32:28,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:32:28,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:32:28,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:32:28,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:32:28,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:32:28,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:32:28,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:32:28,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:32:28,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:32:28,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:32:28,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:32:28,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:32:28,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:32:28,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:32:28,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:32:28,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:32:28,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:32:28,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:32:28,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:32:28,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:32:28,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:32:28,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:32:28,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:32:28,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:32:28,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:32:28,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:32:28,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:32:28,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:32:28,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:32:28,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:32:28,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:32:28,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:32:28,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:32:28,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:32:28,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:32:28,305 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:32:28,305 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:32:28,305 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:32:28,305 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:32:28,306 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:32:28,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:32:28,306 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:32:28,308 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:32:28,308 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:32:28,308 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:32:28,309 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:32:28,309 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:32:28,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:32:28,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:32:28,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:32:28,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:32:28,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:32:28,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:32:28,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:32:28,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:32:28,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:32:28,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:32:28,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:32:28,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:32:28,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:32:28,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:32:28,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:32:28,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:32:28,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:32:28,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:32:28,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:32:28,316 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:32:28,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:32:28,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:32:28,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:32:28,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:32:28,318 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_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517 [2021-11-03 04:32:28,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:32:28,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:32:28,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:32:28,710 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:32:28,711 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:32:28,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/loop-acceleration/functions_1-2.c [2021-11-03 04:32:28,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/data/d5ac587ff/4276ddc77bb544f18d047b82d0a03863/FLAG690017258 [2021-11-03 04:32:29,426 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:32:29,426 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/sv-benchmarks/c/loop-acceleration/functions_1-2.c [2021-11-03 04:32:29,440 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/data/d5ac587ff/4276ddc77bb544f18d047b82d0a03863/FLAG690017258 [2021-11-03 04:32:29,794 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/data/d5ac587ff/4276ddc77bb544f18d047b82d0a03863 [2021-11-03 04:32:29,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:32:29,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:32:29,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:29,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:32:29,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:32:29,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:29" (1/1) ... [2021-11-03 04:32:29,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cc252b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:29, skipping insertion in model container [2021-11-03 04:32:29,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:29" (1/1) ... [2021-11-03 04:32:29,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:32:29,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:32:30,093 WARN L228 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_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338] [2021-11-03 04:32:30,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:30,118 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:32:30,132 WARN L228 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_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338] [2021-11-03 04:32:30,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:30,152 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:32:30,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30 WrapperNode [2021-11-03 04:32:30,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:30,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:32:30,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:32:30,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:32:30,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (1/1) ... [2021-11-03 04:32:30,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (1/1) ... [2021-11-03 04:32:30,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:32:30,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:32:30,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:32:30,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:32:30,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (1/1) ... [2021-11-03 04:32:30,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (1/1) ... [2021-11-03 04:32:30,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (1/1) ... [2021-11-03 04:32:30,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (1/1) ... [2021-11-03 04:32:30,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (1/1) ... [2021-11-03 04:32:30,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (1/1) ... [2021-11-03 04:32:30,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (1/1) ... [2021-11-03 04:32:30,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:32:30,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:32:30,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:32:30,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:32:30,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (1/1) ... [2021-11-03 04:32:30,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:32:30,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:32:30,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:32:30,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:32:30,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:32:30,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:32:30,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:32:30,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:32:30,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:32:30,626 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-03 04:32:30,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:32:30 BoogieIcfgContainer [2021-11-03 04:32:30,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:32:30,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:32:30,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:32:30,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:32:30,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:32:29" (1/3) ... [2021-11-03 04:32:30,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c89cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:32:30, skipping insertion in model container [2021-11-03 04:32:30,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:30" (2/3) ... [2021-11-03 04:32:30,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c89cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:32:30, skipping insertion in model container [2021-11-03 04:32:30,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:32:30" (3/3) ... [2021-11-03 04:32:30,639 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2021-11-03 04:32:30,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:32:30,646 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:32:30,741 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:32:30,750 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 [2021-11-03 04:32:30,751 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:32:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2021-11-03 04:32:30,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 04:32:30,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:30,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 04:32:30,819 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:30,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1911110, now seen corresponding path program 1 times [2021-11-03 04:32:30,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:30,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327960790] [2021-11-03 04:32:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:30,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:31,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:31,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327960790] [2021-11-03 04:32:31,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327960790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:31,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:31,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:32:31,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285166655] [2021-11-03 04:32:31,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:31,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:31,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:31,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:31,189 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-03 04:32:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:31,227 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-03 04:32:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:31,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-03 04:32:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:31,241 INFO L225 Difference]: With dead ends: 13 [2021-11-03 04:32:31,241 INFO L226 Difference]: Without dead ends: 6 [2021-11-03 04:32:31,246 INFO L786 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 [2021-11-03 04:32:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-03 04:32:31,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-03 04:32:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-11-03 04:32:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-03 04:32:31,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-03 04:32:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:31,295 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-03 04:32:31,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-03 04:32:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-03 04:32:31,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:32:31,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:31,297 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:32:31,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:32:31,298 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash 59139621, now seen corresponding path program 1 times [2021-11-03 04:32:31,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:31,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13004924] [2021-11-03 04:32:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:31,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:31,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:31,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13004924] [2021-11-03 04:32:31,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13004924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:32:31,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450408297] [2021-11-03 04:32:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:31,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:32:31,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:32:31,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:32:31,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:32:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:32:31,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:31,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:31,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450408297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:32:31,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [199296888] [2021-11-03 04:32:31,705 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:32:31,706 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:32:31,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:32:31,720 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:32:31,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:32:31,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,768 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:32:31,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:32:31,775 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:32:31,776 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:32:31,782 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 04:32:31,810 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-03 04:32:31,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:32:31,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:32:31,846 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,847 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:32:31,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:32:31,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:31,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:31,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:32:31,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:32:31,914 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:32:31,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:32:31,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:31,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,941 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 04:32:31,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:32:31,943 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 04:32:31,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:31,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-03 04:32:31,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:32,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:32,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:32,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:32,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-11-03 04:32:32,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:32,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:32,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:32,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:32,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:32,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:32,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:32,315 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-03 04:32:32,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 04:32:32,329 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:32:32,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:32:32,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:32:32,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-03 04:32:32,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027488074] [2021-11-03 04:32:32,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:32:32,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:32,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:32:32,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:32:32,766 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-03 04:32:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:32,811 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-03 04:32:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:32:32,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 5 [2021-11-03 04:32:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:32,812 INFO L225 Difference]: With dead ends: 12 [2021-11-03 04:32:32,812 INFO L226 Difference]: Without dead ends: 9 [2021-11-03 04:32:32,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:32:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-03 04:32:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-03 04:32:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-03 04:32:32,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-03 04:32:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:32,818 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-03 04:32:32,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-03 04:32:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-03 04:32:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:32:32,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:32,819 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-03 04:32:32,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:33,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:32:33,032 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash 787802374, now seen corresponding path program 2 times [2021-11-03 04:32:33,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:33,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234007272] [2021-11-03 04:32:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:33,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:33,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:33,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234007272] [2021-11-03 04:32:33,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234007272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:32:33,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417003663] [2021-11-03 04:32:33,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:32:33,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:32:33,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:32:33,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:32:33,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 04:32:33,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 04:32:33,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:32:33,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-03 04:32:33,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:33,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:33,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417003663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:32:33,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952177208] [2021-11-03 04:32:33,504 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:32:33,504 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:32:33,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:32:33,505 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:32:33,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:32:33,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,513 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:32:33,514 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:32:33,515 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:32:33,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:32:33,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 04:32:33,524 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-03 04:32:33,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:32:33,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:32:33,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:32:33,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:32:33,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:33,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:32:33,572 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:32:33,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:32:33,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:32:33,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,594 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 04:32:33,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:32:33,597 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 04:32:33,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-03 04:32:33,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:33,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-03 04:32:33,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:33,837 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-03 04:32:33,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 04:32:33,853 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:32:34,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:32:34,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:32:34,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-03 04:32:34,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20451971] [2021-11-03 04:32:34,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 04:32:34,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:34,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 04:32:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:32:34,228 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:34,783 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-03 04:32:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:32:34,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:32:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:34,785 INFO L225 Difference]: With dead ends: 18 [2021-11-03 04:32:34,785 INFO L226 Difference]: Without dead ends: 15 [2021-11-03 04:32:34,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:32:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-03 04:32:34,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-03 04:32:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-03 04:32:34,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-03 04:32:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:34,791 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-03 04:32:34,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-03 04:32:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 04:32:34,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:34,793 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-03 04:32:34,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:34,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-03 04:32:34,993 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash 698647718, now seen corresponding path program 3 times [2021-11-03 04:32:34,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:34,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722386111] [2021-11-03 04:32:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:34,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:35,370 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:35,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722386111] [2021-11-03 04:32:35,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722386111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:32:35,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989068419] [2021-11-03 04:32:35,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:32:35,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:32:35,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:32:35,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:32:35,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 04:32:35,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:32:35,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:32:35,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-03 04:32:35,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:35,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:36,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989068419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:32:36,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492059481] [2021-11-03 04:32:36,115 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:32:36,115 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:32:36,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:32:36,116 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:32:36,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:32:36,145 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,146 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:32:36,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:32:36,153 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:32:36,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:32:36,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 04:32:36,181 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-03 04:32:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:32:36,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:32:36,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:32:36,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:32:36,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:36,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:32:36,258 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:32:36,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:32:36,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:32:36,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 04:32:36,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:32:36,282 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 04:32:36,301 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-03 04:32:36,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,371 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:36,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-11-03 04:32:36,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:36,470 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-03 04:32:36,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 04:32:36,478 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:32:36,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:32:36,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:32:36,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-03 04:32:36,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908014991] [2021-11-03 04:32:36,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-03 04:32:36,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-03 04:32:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2021-11-03 04:32:36,872 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) 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) [2021-11-03 04:32:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:43,297 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-03 04:32:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 04:32:43,298 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) 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) Word has length 14 [2021-11-03 04:32:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:43,299 INFO L225 Difference]: With dead ends: 30 [2021-11-03 04:32:43,300 INFO L226 Difference]: Without dead ends: 27 [2021-11-03 04:32:43,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=449, Invalid=957, Unknown=0, NotChecked=0, Total=1406 [2021-11-03 04:32:43,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-03 04:32:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-03 04:32:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2021-11-03 04:32:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-03 04:32:43,308 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-03 04:32:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:43,309 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-03 04:32:43,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) 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) [2021-11-03 04:32:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-03 04:32:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-03 04:32:43,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:43,311 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-03 04:32:43,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:43,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-03 04:32:43,512 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1843139558, now seen corresponding path program 4 times [2021-11-03 04:32:43,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:32:43,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532797170] [2021-11-03 04:32:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:43,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:32:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:44,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:32:44,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532797170] [2021-11-03 04:32:44,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532797170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:32:44,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897315576] [2021-11-03 04:32:44,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:32:44,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:32:44,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:32:44,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:32:44,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 04:32:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:44,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 179 conjunts are in the unsatisfiable core [2021-11-03 04:32:44,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:44,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:46,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897315576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:32:46,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [619348097] [2021-11-03 04:32:46,261 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:32:46,261 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:32:46,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:32:46,262 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:32:46,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:32:46,267 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,268 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:32:46,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:32:46,270 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:32:46,271 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:32:46,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 04:32:46,278 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-03 04:32:46,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:32:46,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:32:46,292 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:32:46,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:32:46,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:46,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:32:46,320 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,323 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:32:46,324 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,325 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:32:46,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:32:46,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 04:32:46,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:32:46,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 04:32:46,338 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-03 04:32:46,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,411 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:32:46,425 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 251 [2021-11-03 04:32:46,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:32:46,487 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-03 04:32:46,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 04:32:46,500 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:32:46,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:32:46,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:32:46,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-03 04:32:46,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373776450] [2021-11-03 04:32:46,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-03 04:32:46,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:32:46,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-03 04:32:46,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1973, Unknown=0, NotChecked=0, Total=2652 [2021-11-03 04:32:46,990 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) [2021-11-03 04:33:02,273 WARN L207 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 94 DAG size of output: 10 [2021-11-03 04:36:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:00,273 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-03 04:36:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-03 04:36:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 26 [2021-11-03 04:36:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:00,275 INFO L225 Difference]: With dead ends: 54 [2021-11-03 04:36:00,275 INFO L226 Difference]: Without dead ends: 51 [2021-11-03 04:36:00,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 195.0s TimeCoverageRelationStatistics Valid=1755, Invalid=3644, Unknown=3, NotChecked=0, Total=5402 [2021-11-03 04:36:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-03 04:36:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-03 04:36:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2021-11-03 04:36:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-03 04:36:00,290 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-03 04:36:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:00,290 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-03 04:36:00,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) [2021-11-03 04:36:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-03 04:36:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 04:36:00,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:00,293 INFO L513 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2021-11-03 04:36:00,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-03 04:36:00,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:36:00,515 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:00,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:00,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1086025114, now seen corresponding path program 5 times [2021-11-03 04:36:00,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:00,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968408118] [2021-11-03 04:36:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:00,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:02,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:02,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968408118] [2021-11-03 04:36:02,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968408118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:36:02,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771653105] [2021-11-03 04:36:02,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:36:02,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:36:02,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:36:02,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:36:02,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_863f3ec0-2b0b-4816-a4de-12ab7d7d974a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 04:36:07,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-03 04:36:07,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:36:07,497 WARN L261 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 377 conjunts are in the unsatisfiable core [2021-11-03 04:36:07,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:08,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:16,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771653105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:16,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390310768] [2021-11-03 04:36:16,056 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:36:16,057 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:36:16,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:36:16,057 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:36:16,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:36:16,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,063 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:36:16,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:36:16,065 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:36:16,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:36:16,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-03 04:36:16,076 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-03 04:36:16,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:36:16,089 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,090 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:36:16,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,091 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:36:16,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:36:16,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:16,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:36:16,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,123 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:36:16,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,126 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:36:16,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:36:16,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,132 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-03 04:36:16,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:36:16,134 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-11-03 04:36:16,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,139 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-03 04:36:16,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,184 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:36:16,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-11-03 04:36:16,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:36:16,252 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-03 04:36:16,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 04:36:16,261 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:36:17,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:36:17,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:36:17,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 49] total 97 [2021-11-03 04:36:17,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164312550] [2021-11-03 04:36:17,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-03 04:36:17,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:17,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-03 04:36:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2505, Invalid=7595, Unknown=0, NotChecked=0, Total=10100 [2021-11-03 04:36:17,089 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 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) [2021-11-03 04:37:11,578 WARN L207 SmtUtils]: Spent 51.58 s on a formula simplification. DAG size of input: 241 DAG size of output: 17 [2021-11-03 04:38:32,017 WARN L207 SmtUtils]: Spent 1.34 m on a formula simplification. DAG size of input: 244 DAG size of output: 20 [2021-11-03 04:39:23,877 WARN L207 SmtUtils]: Spent 42.31 s on a formula simplification. DAG size of input: 236 DAG size of output: 17 [2021-11-03 04:40:10,980 WARN L207 SmtUtils]: Spent 33.87 s on a formula simplification. DAG size of input: 231 DAG size of output: 17 [2021-11-03 04:40:58,105 WARN L207 SmtUtils]: Spent 29.72 s on a formula simplification. DAG size of input: 226 DAG size of output: 17 [2021-11-03 04:42:04,319 WARN L207 SmtUtils]: Spent 41.64 s on a formula simplification. DAG size of input: 221 DAG size of output: 17 [2021-11-03 04:42:57,852 WARN L207 SmtUtils]: Spent 31.35 s on a formula simplification. DAG size of input: 216 DAG size of output: 17 [2021-11-03 04:43:52,819 WARN L207 SmtUtils]: Spent 25.82 s on a formula simplification. DAG size of input: 211 DAG size of output: 17 [2021-11-03 04:44:38,483 WARN L207 SmtUtils]: Spent 16.98 s on a formula simplification. DAG size of input: 206 DAG size of output: 17 [2021-11-03 04:45:33,928 WARN L207 SmtUtils]: Spent 23.53 s on a formula simplification. DAG size of input: 201 DAG size of output: 17 [2021-11-03 04:46:32,561 WARN L207 SmtUtils]: Spent 24.91 s on a formula simplification. DAG size of input: 196 DAG size of output: 17