./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P --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 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:47:45,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:47:45,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:47:46,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:47:46,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:47:46,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:47:46,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:47:46,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:47:46,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:47:46,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:47:46,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:47:46,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:47:46,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:47:46,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:47:46,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:47:46,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:47:46,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:47:46,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:47:46,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:47:46,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:47:46,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:47:46,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:47:46,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:47:46,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:47:46,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:47:46,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:47:46,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:47:46,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:47:46,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:47:46,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:47:46,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:47:46,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:47:46,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:47:46,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:47:46,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:47:46,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:47:46,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:47:46,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:47:46,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:47:46,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:47:46,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:47:46,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:47:46,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:47:46,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:47:46,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:47:46,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:47:46,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:47:46,200 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:47:46,201 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:47:46,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:47:46,201 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:47:46,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:47:46,203 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:47:46,203 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:47:46,203 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:47:46,204 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:47:46,204 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:47:46,204 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:47:46,205 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:47:46,205 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:47:46,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:47:46,206 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:47:46,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:47:46,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:47:46,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:47:46,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:47:46,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:47:46,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:47:46,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:47:46,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:47:46,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:47:46,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:47:46,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:47:46,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:47:46,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:47:46,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:47:46,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:47:46,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:47:46,213 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:47:46,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:47:46,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:47:46,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:47:46,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:47:46,214 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_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 [2021-11-21 00:47:46,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:47:46,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:47:46,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:47:46,556 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:47:46,557 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:47:46,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2021-11-21 00:47:46,628 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/data/6932ac1a9/8c510f1f15cc44508a07965bae4cd7de/FLAG02b33ebae [2021-11-21 00:47:47,200 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:47:47,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2021-11-21 00:47:47,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/data/6932ac1a9/8c510f1f15cc44508a07965bae4cd7de/FLAG02b33ebae [2021-11-21 00:47:47,476 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/data/6932ac1a9/8c510f1f15cc44508a07965bae4cd7de [2021-11-21 00:47:47,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:47:47,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:47:47,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:47:47,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:47:47,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:47:47,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:47:47" (1/1) ... [2021-11-21 00:47:47,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2e5bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:47, skipping insertion in model container [2021-11-21 00:47:47,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:47:47" (1/1) ... [2021-11-21 00:47:47,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:47:47,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:47:47,993 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2021-11-21 00:47:47,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:47:48,011 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:47:48,079 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2021-11-21 00:47:48,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:47:48,115 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:47:48,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48 WrapperNode [2021-11-21 00:47:48,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:47:48,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:47:48,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:47:48,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:47:48,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (1/1) ... [2021-11-21 00:47:48,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (1/1) ... [2021-11-21 00:47:48,189 INFO L137 Inliner]: procedures = 126, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 118 [2021-11-21 00:47:48,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:47:48,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:47:48,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:47:48,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:47:48,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (1/1) ... [2021-11-21 00:47:48,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (1/1) ... [2021-11-21 00:47:48,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (1/1) ... [2021-11-21 00:47:48,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (1/1) ... [2021-11-21 00:47:48,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (1/1) ... [2021-11-21 00:47:48,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (1/1) ... [2021-11-21 00:47:48,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (1/1) ... [2021-11-21 00:47:48,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:47:48,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:47:48,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:47:48,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:47:48,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (1/1) ... [2021-11-21 00:47:48,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:47:48,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:48,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:47:48,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:47:48,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:47:48,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:47:48,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:47:48,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:47:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:47:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:47:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:47:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:47:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:47:48,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:47:48,476 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:47:48,478 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:47:48,667 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:47:48,735 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:47:48,736 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-21 00:47:48,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:47:48 BoogieIcfgContainer [2021-11-21 00:47:48,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:47:48,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:47:48,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:47:48,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:47:48,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:47:47" (1/3) ... [2021-11-21 00:47:48,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2e822d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:47:48, skipping insertion in model container [2021-11-21 00:47:48,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:48" (2/3) ... [2021-11-21 00:47:48,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2e822d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:47:48, skipping insertion in model container [2021-11-21 00:47:48,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:47:48" (3/3) ... [2021-11-21 00:47:48,762 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2021-11-21 00:47:48,768 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:47:48,768 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:47:48,816 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:47:48,823 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 [2021-11-21 00:47:48,824 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:47:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:47:48,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:48,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:48,844 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1963659983, now seen corresponding path program 1 times [2021-11-21 00:47:48,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:47:48,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021540208] [2021-11-21 00:47:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:48,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:47:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:49,061 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:47:49,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021540208] [2021-11-21 00:47:49,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021540208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:49,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:49,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:47:49,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14359134] [2021-11-21 00:47:49,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:49,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:47:49,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:47:49,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:47:49,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:47:49,103 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:49,162 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2021-11-21 00:47:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:47:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 00:47:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:49,173 INFO L225 Difference]: With dead ends: 27 [2021-11-21 00:47:49,173 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 00:47:49,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:47:49,181 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:49,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:47:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 00:47:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-21 00:47:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-11-21 00:47:49,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2021-11-21 00:47:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:49,219 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-11-21 00:47:49,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-11-21 00:47:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:47:49,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:49,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:49,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:47:49,222 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:49,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1491156930, now seen corresponding path program 1 times [2021-11-21 00:47:49,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:47:49,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507779418] [2021-11-21 00:47:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:49,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:47:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:49,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:47:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507779418] [2021-11-21 00:47:49,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507779418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:47:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332023682] [2021-11-21 00:47:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:49,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:49,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:49,360 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:49,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:47:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:47:49,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:49,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:49,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332023682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:49,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1677457304] [2021-11-21 00:47:49,677 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:47:49,677 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:47:49,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:47:49,690 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:47:49,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:47:49,999 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-21 00:47:50,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-21 00:47:50,133 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:47:50,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 00:47:50,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:50,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:50,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-21 00:47:50,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:50,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:50,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-21 00:47:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:50,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-11-21 00:47:50,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:50,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:47:50,842 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-21 00:47:50,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 249 [2021-11-21 00:47:50,904 INFO L354 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2021-11-21 00:47:50,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 251 [2021-11-21 00:47:52,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:52,236 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-21 00:47:52,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 284 [2021-11-21 00:47:52,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:52,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:52,260 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:47:52,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-21 00:47:52,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:52,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:52,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:52,329 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:47:52,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 265 treesize of output 242 [2021-11-21 00:47:52,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:52,396 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-21 00:47:52,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 253 [2021-11-21 00:47:52,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:52,433 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-21 00:47:52,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 253 treesize of output 246 [2021-11-21 00:47:52,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:52,471 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-21 00:47:52,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 249 treesize of output 242 [2021-11-21 00:47:53,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:47:53,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:47:53,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:53,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:53,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2021-11-21 00:47:53,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:53,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:53,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-21 00:47:53,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:53,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:53,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-21 00:47:53,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:47:53,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:47:53,848 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:47:54,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1677457304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:54,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:47:54,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2021-11-21 00:47:54,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352835169] [2021-11-21 00:47:54,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:54,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:47:54,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:47:54,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:47:54,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:47:54,061 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:54,134 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2021-11-21 00:47:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:47:54,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 00:47:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:54,136 INFO L225 Difference]: With dead ends: 18 [2021-11-21 00:47:54,136 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 00:47:54,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:47:54,140 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:54,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:47:54,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 00:47:54,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-21 00:47:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-11-21 00:47:54,159 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2021-11-21 00:47:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:54,159 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-21 00:47:54,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-11-21 00:47:54,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:47:54,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:54,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:54,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:54,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:54,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:54,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1766738179, now seen corresponding path program 1 times [2021-11-21 00:47:54,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:47:54,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960657545] [2021-11-21 00:47:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:54,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:47:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:54,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:47:54,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960657545] [2021-11-21 00:47:54,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960657545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:47:54,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808991381] [2021-11-21 00:47:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:54,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:54,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:54,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:54,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:47:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:47:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:54,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:54,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808991381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:54,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821998847] [2021-11-21 00:47:54,569 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:47:54,569 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:47:54,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:47:54,569 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:47:54,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:47:54,673 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:47:54,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 00:47:54,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:47:54,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:54,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:54,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-21 00:47:54,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:54,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:54,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-21 00:47:54,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:54,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-11-21 00:47:54,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:54,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:47:55,123 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-21 00:47:55,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 249 [2021-11-21 00:47:55,168 INFO L354 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2021-11-21 00:47:55,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 251 [2021-11-21 00:47:55,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:56,114 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-21 00:47:56,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 284 [2021-11-21 00:47:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:56,248 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-21 00:47:56,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 293 [2021-11-21 00:47:56,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:56,276 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:47:56,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 275 [2021-11-21 00:47:56,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:56,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:56,332 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:47:56,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 251 [2021-11-21 00:47:56,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:56,372 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-21 00:47:56,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 253 treesize of output 246 [2021-11-21 00:47:56,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:56,402 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-21 00:47:56,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 249 treesize of output 242 [2021-11-21 00:47:57,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:47:57,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:47:57,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:57,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:57,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2021-11-21 00:47:57,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:57,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:57,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-21 00:47:57,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:57,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:57,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-21 00:47:57,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:47:57,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:47:57,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:47:57,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:47:57,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:47:57,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:47:57,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:47:57,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:47:57,843 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:47:58,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1821998847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:58,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:47:58,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2021-11-21 00:47:58,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252936806] [2021-11-21 00:47:58,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:58,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:47:58,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:47:58,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:47:58,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:47:58,101 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:58,181 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2021-11-21 00:47:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:47:58,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 00:47:58,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:58,182 INFO L225 Difference]: With dead ends: 21 [2021-11-21 00:47:58,182 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 00:47:58,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:47:58,184 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:58,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:47:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 00:47:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-21 00:47:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-11-21 00:47:58,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 11 [2021-11-21 00:47:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:58,190 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-11-21 00:47:58,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-11-21 00:47:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:47:58,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:58,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:58,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:58,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:58,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash 446479962, now seen corresponding path program 1 times [2021-11-21 00:47:58,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:47:58,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219069892] [2021-11-21 00:47:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:58,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:47:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:47:58,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:47:58,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219069892] [2021-11-21 00:47:58,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219069892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:47:58,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012917187] [2021-11-21 00:47:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:58,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:58,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:58,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:58,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:47:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:47:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:47:58,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:47:58,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012917187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:58,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40070443] [2021-11-21 00:47:58,584 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:47:58,585 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:47:58,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:47:58,585 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:47:58,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:47:58,698 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:47:58,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 00:47:58,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:47:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:58,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:58,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-21 00:47:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:58,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:58,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-21 00:47:58,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:58,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-11-21 00:47:58,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:47:58,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:47:59,100 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-21 00:47:59,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 249 [2021-11-21 00:47:59,152 INFO L354 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2021-11-21 00:47:59,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 251 [2021-11-21 00:47:59,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:59,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:47:59,968 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-21 00:47:59,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 267 [2021-11-21 00:47:59,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:00,057 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-21 00:48:00,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 269 treesize of output 278 [2021-11-21 00:48:00,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:00,120 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-21 00:48:00,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 287 [2021-11-21 00:48:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:00,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:00,182 INFO L354 Elim1Store]: treesize reduction 89, result has 26.4 percent of original size [2021-11-21 00:48:00,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 287 treesize of output 277 [2021-11-21 00:48:00,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:00,219 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-21 00:48:00,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 279 treesize of output 272 [2021-11-21 00:48:00,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:00,254 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-21 00:48:00,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 275 treesize of output 268 [2021-11-21 00:48:01,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:48:01,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:48:01,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:01,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:01,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-21 00:48:01,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:01,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:01,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-21 00:48:01,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:01,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:01,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2021-11-21 00:48:01,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:48:01,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:48:01,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:48:01,997 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:48:01,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 172 [2021-11-21 00:48:02,023 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:48:02,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 170 [2021-11-21 00:48:02,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:48:03,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:48:03,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:48:03,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:48:03,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:48:03,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:48:03,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:48:04,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:48:04,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:48:04,497 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:48:05,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:48:05,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:48:05,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-21 00:48:05,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272027454] [2021-11-21 00:48:05,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:48:05,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:48:05,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:48:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:48:05,429 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:05,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:05,453 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2021-11-21 00:48:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:48:05,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 00:48:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:05,454 INFO L225 Difference]: With dead ends: 24 [2021-11-21 00:48:05,455 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 00:48:05,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:48:05,456 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:05,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:48:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 00:48:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-21 00:48:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-21 00:48:05,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2021-11-21 00:48:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:05,463 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-21 00:48:05,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-21 00:48:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:48:05,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:05,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:48:05,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:48:05,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:48:05,665 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:48:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:05,665 INFO L85 PathProgramCache]: Analyzing trace with hash 808918603, now seen corresponding path program 2 times [2021-11-21 00:48:05,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:05,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694678242] [2021-11-21 00:48:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:05,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:48:05,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694678242] [2021-11-21 00:48:05,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694678242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:48:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198358038] [2021-11-21 00:48:05,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:48:05,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:48:05,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:48:05,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:48:05,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:48:05,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 00:48:05,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:48:05,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:48:05,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:48:05,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:48:05,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198358038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:05,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:48:05,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-11-21 00:48:05,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352023511] [2021-11-21 00:48:05,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:05,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:48:05,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:05,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:48:05,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:48:05,858 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:05,912 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-11-21 00:48:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:48:05,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 00:48:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:05,915 INFO L225 Difference]: With dead ends: 27 [2021-11-21 00:48:05,915 INFO L226 Difference]: Without dead ends: 22 [2021-11-21 00:48:05,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:48:05,917 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:05,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 13 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:48:05,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-21 00:48:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-11-21 00:48:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-21 00:48:05,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 14 [2021-11-21 00:48:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:05,925 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-21 00:48:05,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-21 00:48:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:48:05,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:05,926 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:48:05,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:48:06,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:48:06,140 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:48:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash -694979649, now seen corresponding path program 1 times [2021-11-21 00:48:06,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:06,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587470900] [2021-11-21 00:48:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:06,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:48:06,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:06,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587470900] [2021-11-21 00:48:06,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587470900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:48:06,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954020344] [2021-11-21 00:48:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:06,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:48:06,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:48:06,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:48:06,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:48:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:06,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:48:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:48:06,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:48:06,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954020344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:48:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276650295] [2021-11-21 00:48:06,406 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:48:06,406 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:48:06,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:48:06,407 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:48:06,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:48:06,515 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:48:06,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 00:48:06,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-21 00:48:06,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:06,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-11-21 00:48:06,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:06,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:48:06,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:06,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-11-21 00:48:06,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:06,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-21 00:48:06,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:06,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:06,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:06,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:06,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-21 00:48:06,936 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-21 00:48:06,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 249 [2021-11-21 00:48:06,978 INFO L354 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2021-11-21 00:48:06,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 251 [2021-11-21 00:48:07,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:07,935 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-21 00:48:07,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 284 [2021-11-21 00:48:07,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:07,957 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:48:07,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-21 00:48:07,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:07,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:07,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:08,004 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:48:08,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 265 treesize of output 242 [2021-11-21 00:48:08,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:08,062 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-21 00:48:08,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 253 [2021-11-21 00:48:08,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:08,094 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-21 00:48:08,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 253 treesize of output 246 [2021-11-21 00:48:08,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:08,132 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-21 00:48:08,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 243 treesize of output 236 [2021-11-21 00:48:08,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:48:08,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:48:08,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:08,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2021-11-21 00:48:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:08,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:08,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-21 00:48:08,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:08,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:08,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-21 00:48:09,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:48:09,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:48:09,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:48:09,561 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:48:09,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 172 [2021-11-21 00:48:09,595 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 00:48:09,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 170 [2021-11-21 00:48:09,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:48:10,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:48:10,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:48:10,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:48:11,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:48:11,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:48:11,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:48:12,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:48:12,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:48:12,623 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:48:13,455 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:48:13,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:48:13,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-21 00:48:13,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665721681] [2021-11-21 00:48:13,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:48:13,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:48:13,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:48:13,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:48:13,457 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:13,522 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-11-21 00:48:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:48:13,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 00:48:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:13,523 INFO L225 Difference]: With dead ends: 31 [2021-11-21 00:48:13,523 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 00:48:13,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:48:13,524 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 55 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:13,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 12 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:48:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 00:48:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-11-21 00:48:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2021-11-21 00:48:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-21 00:48:13,531 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 15 [2021-11-21 00:48:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:13,532 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-21 00:48:13,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-21 00:48:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 00:48:13,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:13,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:48:13,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:48:13,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:48:13,748 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:48:13,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:13,748 INFO L85 PathProgramCache]: Analyzing trace with hash 706001952, now seen corresponding path program 2 times [2021-11-21 00:48:13,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:13,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176823520] [2021-11-21 00:48:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:13,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:14,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:14,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176823520] [2021-11-21 00:48:14,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176823520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:48:14,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164469474] [2021-11-21 00:48:14,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:48:14,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:48:14,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:48:14,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:48:14,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:48:14,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:48:14,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:48:14,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-21 00:48:14,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:14,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:48:14,441 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:48:14,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:48:14,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:48:14,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:48:14,611 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-21 00:48:14,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 88 [2021-11-21 00:48:14,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 79 [2021-11-21 00:48:14,629 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-21 00:48:14,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 63 [2021-11-21 00:48:14,739 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:48:14,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 60 [2021-11-21 00:48:14,754 INFO L354 Elim1Store]: treesize reduction 61, result has 23.8 percent of original size [2021-11-21 00:48:14,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 62 [2021-11-21 00:48:14,767 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:48:14,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 40 [2021-11-21 00:48:14,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 56 [2021-11-21 00:48:14,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2021-11-21 00:48:14,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-21 00:48:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:48:15,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:47,637 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_28| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_28|) (and (forall ((|ULTIMATE.start_sll_update_at_~data#1| Int) (v_DerPreprocessor_20 Int) (v_DerPreprocessor_21 Int)) (<= (+ (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| |ULTIMATE.start_sll_update_at_~data#1|)) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_20) .cse0)) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_21) .cse0))) 1) (* 2 |c_ULTIMATE.start_main_~len~0#1|))) (forall ((|ULTIMATE.start_sll_update_at_~data#1| Int) (v_DerPreprocessor_20 Int) (v_DerPreprocessor_21 Int)) (<= (* 2 |c_ULTIMATE.start_main_~len~0#1|) (+ (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| |ULTIMATE.start_sll_update_at_~data#1|)) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_20) .cse1)) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_21) .cse1))) 1)))))) is different from false [2021-11-21 00:48:47,668 INFO L354 Elim1Store]: treesize reduction 43, result has 8.5 percent of original size [2021-11-21 00:48:47,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 461 treesize of output 421 [2021-11-21 00:48:50,041 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_28| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_28|) (let ((.cse1 (* 2 |c_ULTIMATE.start_main_~len~0#1|)) (.cse0 (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1))) (and (or (forall ((v_DerPreprocessor_22 Int) (v_prenex_2 Int)) (not (= |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_DerPreprocessor_22)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_2) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (forall ((v_DerPreprocessor_23 Int) (v_prenex_1 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_DerPreprocessor_23)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_1) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)))) (<= .cse0 .cse1) (<= .cse1 .cse0) (forall ((v_DerPreprocessor_22 Int) (v_DerPreprocessor_21 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_DerPreprocessor_22)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_21) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) (forall ((v_DerPreprocessor_23 Int) (v_DerPreprocessor_20 Int)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_DerPreprocessor_23)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_20) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (forall ((v_DerPreprocessor_22 Int) (v_prenex_2 Int)) (= |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_DerPreprocessor_22)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_2) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (or (forall ((v_DerPreprocessor_22 Int) (v_DerPreprocessor_21 Int)) (not (= |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_DerPreprocessor_22)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_21) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (forall ((v_DerPreprocessor_23 Int) (v_DerPreprocessor_20 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_DerPreprocessor_23)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_20) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)))) (forall ((v_DerPreprocessor_23 Int) (v_prenex_1 Int)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_DerPreprocessor_23)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_1) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))))))) is different from false [2021-11-21 00:48:52,249 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_28| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_28|) (let ((.cse1 (* 2 |c_ULTIMATE.start_main_~len~0#1|)) (.cse0 (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (forall ((v_DerPreprocessor_23 Int) (v_prenex_1 Int)) (let ((.cse3 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse3))) (= .cse2 (select (store (select (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse3) v_DerPreprocessor_23)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_1) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))))) (or (forall ((v_DerPreprocessor_23 Int) (v_DerPreprocessor_20 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (let ((.cse5 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse5))) (store |c_#memory_$Pointer$.base| .cse4 (store (select |c_#memory_$Pointer$.base| .cse4) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse5) v_DerPreprocessor_23)))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_20) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (forall ((v_DerPreprocessor_22 Int) (v_DerPreprocessor_21 Int)) (not (= |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| (select (store (select (let ((.cse7 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse7))) (store |c_#memory_$Pointer$.offset| .cse6 (store (select |c_#memory_$Pointer$.offset| .cse6) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse7) v_DerPreprocessor_22)))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_21) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))))) (forall ((v_DerPreprocessor_23 Int) (v_DerPreprocessor_20 Int)) (let ((.cse9 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse9))) (= .cse8 (select (store (select (store |c_#memory_$Pointer$.base| .cse8 (store (select |c_#memory_$Pointer$.base| .cse8) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse9) v_DerPreprocessor_23)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_20) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))))) (forall ((v_DerPreprocessor_22 Int) (v_DerPreprocessor_21 Int)) (let ((.cse12 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse10 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse12))) (= .cse10 (select (store (select (let ((.cse11 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse12))) (store |c_#memory_$Pointer$.offset| .cse11 (store (select |c_#memory_$Pointer$.offset| .cse11) .cse10 v_DerPreprocessor_22))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_21) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))))) (or (forall ((v_DerPreprocessor_22 Int) (v_prenex_2 Int)) (not (= |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| (select (store (select (let ((.cse14 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse13 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse14))) (store |c_#memory_$Pointer$.offset| .cse13 (store (select |c_#memory_$Pointer$.offset| .cse13) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse14) v_DerPreprocessor_22)))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_2) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (forall ((v_DerPreprocessor_23 Int) (v_prenex_1 Int)) (not (= (select (store (select (let ((.cse16 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse15 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse16))) (store |c_#memory_$Pointer$.base| .cse15 (store (select |c_#memory_$Pointer$.base| .cse15) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse16) v_DerPreprocessor_23)))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_1) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)))) (forall ((v_DerPreprocessor_22 Int) (v_prenex_2 Int)) (let ((.cse19 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse18 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse19))) (= (select (store (select (let ((.cse17 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse19))) (store |c_#memory_$Pointer$.offset| .cse17 (store (select |c_#memory_$Pointer$.offset| .cse17) .cse18 v_DerPreprocessor_22))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_2) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) .cse18)))))))) is different from false [2021-11-21 00:48:54,420 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_28| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_28|) (let ((.cse4 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (or (forall ((v_DerPreprocessor_22 Int) (v_prenex_2 Int)) (not (= |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (store (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) v_DerPreprocessor_22))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_2) .cse1))))) (forall ((v_DerPreprocessor_23 Int) (v_prenex_1 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (let ((.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (store (select (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse3))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse3) v_DerPreprocessor_23))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_1) .cse3)))))) (<= |c_ULTIMATE.start_main_~len~0#1| .cse4) (forall ((v_DerPreprocessor_23 Int) (v_DerPreprocessor_20 Int)) (let ((.cse6 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse6))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse5 (store (select |c_#memory_$Pointer$.base| .cse5) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse6) v_DerPreprocessor_23)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_20) .cse6) .cse5)))) (<= .cse4 |c_ULTIMATE.start_main_~len~0#1|) (or (forall ((v_DerPreprocessor_23 Int) (v_DerPreprocessor_20 Int)) (not (= (let ((.cse8 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (store (select (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse8))) (store |c_#memory_$Pointer$.base| .cse7 (store (select |c_#memory_$Pointer$.base| .cse7) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse8) v_DerPreprocessor_23))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_20) .cse8)) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_DerPreprocessor_22 Int) (v_DerPreprocessor_21 Int)) (not (= |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| (let ((.cse10 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (store (select (let ((.cse9 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse10))) (store |c_#memory_$Pointer$.offset| .cse9 (store (select |c_#memory_$Pointer$.offset| .cse9) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse10) v_DerPreprocessor_22))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_21) .cse10)))))) (forall ((v_DerPreprocessor_23 Int) (v_prenex_1 Int)) (let ((.cse12 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse11 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse12))) (= .cse11 (select (store (select (store |c_#memory_$Pointer$.base| .cse11 (store (select |c_#memory_$Pointer$.base| .cse11) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse12) v_DerPreprocessor_23)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_1) .cse12))))) (forall ((v_DerPreprocessor_22 Int) (v_DerPreprocessor_21 Int)) (let ((.cse15 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse14 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse15))) (= (select (store (select (let ((.cse13 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse15))) (store |c_#memory_$Pointer$.offset| .cse13 (store (select |c_#memory_$Pointer$.offset| .cse13) .cse14 v_DerPreprocessor_22))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_21) .cse15) .cse14)))) (forall ((v_DerPreprocessor_22 Int) (v_prenex_2 Int)) (let ((.cse18 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse17 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse18))) (= (select (store (select (let ((.cse16 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse18))) (store |c_#memory_$Pointer$.offset| .cse16 (store (select |c_#memory_$Pointer$.offset| .cse16) .cse17 v_DerPreprocessor_22))) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_2) .cse18) .cse17)))))))) is different from false [2021-11-21 00:48:56,554 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_28| Int)) (or (and (forall ((v_DerPreprocessor_22 Int) (v_DerPreprocessor_21 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse2))) (= .cse0 (select (store (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse2))) (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) .cse0 v_DerPreprocessor_22))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_21) .cse2))))) (forall ((v_DerPreprocessor_22 Int) (v_prenex_2 Int)) (let ((.cse5 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse4 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse5))) (= (select (store (select (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse5))) (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) .cse4 v_DerPreprocessor_22))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_2) .cse5) .cse4)))) (or (forall ((v_DerPreprocessor_22 Int) (v_prenex_2 Int)) (not (= (let ((.cse7 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (store (select (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse7))) (store |c_#memory_$Pointer$.offset| .cse6 (store (select |c_#memory_$Pointer$.offset| .cse6) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse7) v_DerPreprocessor_22))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_2) .cse7)) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28|))) (forall ((v_DerPreprocessor_23 Int) (v_prenex_1 Int)) (not (= (let ((.cse9 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (store (select (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse9))) (store |c_#memory_$Pointer$.base| .cse8 (store (select |c_#memory_$Pointer$.base| .cse8) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse9) v_DerPreprocessor_23))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_1) .cse9)) |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (forall ((v_DerPreprocessor_23 Int) (v_DerPreprocessor_20 Int)) (let ((.cse11 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse11))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse10 (store (select |c_#memory_$Pointer$.base| .cse10) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse11) v_DerPreprocessor_23)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_20) .cse11) .cse10)))) (or (forall ((v_DerPreprocessor_23 Int) (v_DerPreprocessor_20 Int)) (not (= (let ((.cse13 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (store (select (let ((.cse12 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse13))) (store |c_#memory_$Pointer$.base| .cse12 (store (select |c_#memory_$Pointer$.base| .cse12) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse13) v_DerPreprocessor_23))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_20) .cse13)) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (forall ((v_DerPreprocessor_22 Int) (v_DerPreprocessor_21 Int)) (not (= |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| (let ((.cse15 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (store (select (let ((.cse14 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse15))) (store |c_#memory_$Pointer$.offset| .cse14 (store (select |c_#memory_$Pointer$.offset| .cse14) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse15) v_DerPreprocessor_22))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_DerPreprocessor_21) .cse15)))))) (forall ((v_DerPreprocessor_23 Int) (v_prenex_1 Int)) (let ((.cse17 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse16 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse17))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse16 (store (select |c_#memory_$Pointer$.base| .cse16) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse17) v_DerPreprocessor_23)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_28| v_prenex_1) .cse17) .cse16))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_28|))) is different from false [2021-11-21 00:48:56,763 INFO L354 Elim1Store]: treesize reduction 76, result has 61.4 percent of original size [2021-11-21 00:48:56,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 331 treesize of output 339 [2021-11-21 00:48:56,850 INFO L354 Elim1Store]: treesize reduction 76, result has 61.4 percent of original size [2021-11-21 00:48:56,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 339 treesize of output 347 [2021-11-21 00:48:56,861 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:48:56,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 347 treesize of output 345 [2021-11-21 00:48:56,885 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:48:56,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 343 [2021-11-21 00:48:56,899 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:48:56,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 341 [2021-11-21 00:48:56,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-21 00:48:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491046793] [2021-11-21 00:48:56,906 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:48:56,906 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:48:56,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:48:56,906 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:48:56,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:48:56,960 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6f161485 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:388) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:48:56,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:48:56,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-21 00:48:56,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85776860] [2021-11-21 00:48:56,964 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:48:56,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:48:56,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:48:56,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=899, Unknown=16, NotChecked=320, Total=1332 [2021-11-21 00:48:56,974 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 16 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:48:56,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=97, Invalid=899, Unknown=16, NotChecked=320, Total=1332 [2021-11-21 00:48:56,976 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:56,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:48:57,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 00:48:57,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:48:57,192 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6f161485 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:48:57,194 INFO L158 Benchmark]: Toolchain (without parser) took 69711.07ms. Allocated memory was 98.6MB in the beginning and 159.4MB in the end (delta: 60.8MB). Free memory was 64.5MB in the beginning and 53.4MB in the end (delta: 11.1MB). Peak memory consumption was 71.0MB. Max. memory is 16.1GB. [2021-11-21 00:48:57,194 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 98.6MB. Free memory was 50.8MB in the beginning and 50.8MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:48:57,195 INFO L158 Benchmark]: CACSL2BoogieTranslator took 630.55ms. Allocated memory is still 98.6MB. Free memory was 64.3MB in the beginning and 65.2MB in the end (delta: -931.2kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-21 00:48:57,195 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.51ms. Allocated memory is still 98.6MB. Free memory was 65.2MB in the beginning and 63.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:48:57,195 INFO L158 Benchmark]: Boogie Preprocessor took 63.59ms. Allocated memory is still 98.6MB. Free memory was 63.1MB in the beginning and 61.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:48:57,196 INFO L158 Benchmark]: RCFGBuilder took 480.18ms. Allocated memory is still 98.6MB. Free memory was 61.6MB in the beginning and 46.7MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-21 00:48:57,196 INFO L158 Benchmark]: TraceAbstraction took 68437.96ms. Allocated memory was 127.9MB in the beginning and 159.4MB in the end (delta: 31.5MB). Free memory was 104.2MB in the beginning and 53.4MB in the end (delta: 50.8MB). Peak memory consumption was 81.4MB. Max. memory is 16.1GB. [2021-11-21 00:48:57,199 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 98.6MB. Free memory was 50.8MB in the beginning and 50.8MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 630.55ms. Allocated memory is still 98.6MB. Free memory was 64.3MB in the beginning and 65.2MB in the end (delta: -931.2kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.51ms. Allocated memory is still 98.6MB. Free memory was 65.2MB in the beginning and 63.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.59ms. Allocated memory is still 98.6MB. Free memory was 63.1MB in the beginning and 61.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 480.18ms. Allocated memory is still 98.6MB. Free memory was 61.6MB in the beginning and 46.7MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 68437.96ms. Allocated memory was 127.9MB in the beginning and 159.4MB in the end (delta: 31.5MB). Free memory was 104.2MB in the beginning and 53.4MB in the end (delta: 50.8MB). Peak memory consumption was 81.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6f161485 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6f161485: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-21 00:48:57,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P --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 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:48:59,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:48:59,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:48:59,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:48:59,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:48:59,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:48:59,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:48:59,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:48:59,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:48:59,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:48:59,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:48:59,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:48:59,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:48:59,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:48:59,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:48:59,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:48:59,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:48:59,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:48:59,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:48:59,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:48:59,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:48:59,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:48:59,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:48:59,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:48:59,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:48:59,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:48:59,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:48:59,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:48:59,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:48:59,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:48:59,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:48:59,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:48:59,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:48:59,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:48:59,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:48:59,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:48:59,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:48:59,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:48:59,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:48:59,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:48:59,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:48:59,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:48:59,792 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:48:59,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:48:59,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:48:59,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:48:59,795 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:48:59,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:48:59,795 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:48:59,795 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:48:59,796 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:48:59,796 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:48:59,797 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:48:59,797 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:48:59,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:48:59,799 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:48:59,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:48:59,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:48:59,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:48:59,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:48:59,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:48:59,801 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:48:59,801 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:48:59,801 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:48:59,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:48:59,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:48:59,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:48:59,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:48:59,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:48:59,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:48:59,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:48:59,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:48:59,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:48:59,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:48:59,805 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:48:59,805 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:48:59,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:48:59,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:48:59,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:48:59,806 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 [2021-11-21 00:49:00,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:49:00,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:49:00,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:49:00,260 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:49:00,261 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:49:00,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2021-11-21 00:49:00,340 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/data/1c9e96f89/2145a14e24834cb1b77b7ae6f53198ae/FLAGb5fc8b988 [2021-11-21 00:49:01,043 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:49:01,044 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2021-11-21 00:49:01,061 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/data/1c9e96f89/2145a14e24834cb1b77b7ae6f53198ae/FLAGb5fc8b988 [2021-11-21 00:49:01,336 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/data/1c9e96f89/2145a14e24834cb1b77b7ae6f53198ae [2021-11-21 00:49:01,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:49:01,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:49:01,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:49:01,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:49:01,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:49:01,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:01,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67baf764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01, skipping insertion in model container [2021-11-21 00:49:01,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:01,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:49:01,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:49:01,878 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2021-11-21 00:49:01,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:49:01,905 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:49:01,942 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2021-11-21 00:49:01,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:49:01,977 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:49:01,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01 WrapperNode [2021-11-21 00:49:01,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:49:01,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:49:01,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:49:01,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:49:01,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:02,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:02,029 INFO L137 Inliner]: procedures = 129, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 118 [2021-11-21 00:49:02,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:49:02,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:49:02,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:49:02,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:49:02,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:02,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:02,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:02,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:02,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:02,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:02,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:02,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:49:02,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:49:02,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:49:02,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:49:02,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:02,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:49:02,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:02,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:49:02,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:49:02,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 00:49:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:49:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:49:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:49:02,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:49:02,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:49:02,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 00:49:02,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:49:02,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:49:02,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:49:02,293 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:49:02,294 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:49:02,620 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:49:02,628 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:49:02,629 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-21 00:49:02,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:02 BoogieIcfgContainer [2021-11-21 00:49:02,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:49:02,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:49:02,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:49:02,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:49:02,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:49:01" (1/3) ... [2021-11-21 00:49:02,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bdc8e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:49:02, skipping insertion in model container [2021-11-21 00:49:02,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01" (2/3) ... [2021-11-21 00:49:02,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bdc8e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:49:02, skipping insertion in model container [2021-11-21 00:49:02,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:02" (3/3) ... [2021-11-21 00:49:02,641 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2021-11-21 00:49:02,647 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:49:02,647 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:49:02,701 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:49:02,709 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 [2021-11-21 00:49:02,710 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:49:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 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) [2021-11-21 00:49:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:49:02,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:02,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:02,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash -204150994, now seen corresponding path program 1 times [2021-11-21 00:49:02,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:02,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702013177] [2021-11-21 00:49:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:02,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:02,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:02,760 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:02,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:49:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:02,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:49:02,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:02,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:03,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:03,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702013177] [2021-11-21 00:49:03,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702013177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:03,060 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:03,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:49:03,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672119142] [2021-11-21 00:49:03,064 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:03,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:49:03,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:49:03,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:49:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:49:03,111 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 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 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:49:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:03,140 INFO L93 Difference]: Finished difference Result 52 states and 75 transitions. [2021-11-21 00:49:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:49:03,142 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 00:49:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:03,153 INFO L225 Difference]: With dead ends: 52 [2021-11-21 00:49:03,153 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 00:49:03,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:49:03,162 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:03,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:49:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 00:49:03,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-21 00:49:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2021-11-21 00:49:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-21 00:49:03,208 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-11-21 00:49:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:03,209 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-21 00:49:03,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:49:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-21 00:49:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:49:03,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:03,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:03,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:03,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:49:03,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:03,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1517700322, now seen corresponding path program 1 times [2021-11-21 00:49:03,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:03,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035864452] [2021-11-21 00:49:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:03,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:03,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:03,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:03,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:49:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:49:03,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:03,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:03,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035864452] [2021-11-21 00:49:03,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035864452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:03,680 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:03,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:49:03,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34406217] [2021-11-21 00:49:03,681 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:03,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:49:03,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:49:03,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:49:03,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:49:03,684 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:49:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:03,709 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-11-21 00:49:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:49:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 13 [2021-11-21 00:49:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:03,710 INFO L225 Difference]: With dead ends: 45 [2021-11-21 00:49:03,711 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 00:49:03,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:49:03,713 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:03,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:49:03,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 00:49:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-21 00:49:03,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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) [2021-11-21 00:49:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-21 00:49:03,721 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 13 [2021-11-21 00:49:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:03,721 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-21 00:49:03,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-21 00:49:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-21 00:49:03,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 00:49:03,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:03,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:03,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:03,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:49:03,937 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash 266893854, now seen corresponding path program 1 times [2021-11-21 00:49:03,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:03,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631236530] [2021-11-21 00:49:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:03,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:03,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:03,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:03,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:49:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:04,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:49:04,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:49:04,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:49:04,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:04,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631236530] [2021-11-21 00:49:04,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631236530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:04,300 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:04,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:49:04,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213006021] [2021-11-21 00:49:04,304 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:04,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:49:04,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:49:04,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:49:04,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:49:04,307 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) [2021-11-21 00:49:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:04,402 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-11-21 00:49:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:49:04,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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 23 [2021-11-21 00:49:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:04,407 INFO L225 Difference]: With dead ends: 53 [2021-11-21 00:49:04,407 INFO L226 Difference]: Without dead ends: 44 [2021-11-21 00:49:04,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:49:04,412 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 101 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:04,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:49:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-21 00:49:04,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-11-21 00:49:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 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) [2021-11-21 00:49:04,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-21 00:49:04,439 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 23 [2021-11-21 00:49:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:04,439 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-21 00:49:04,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) [2021-11-21 00:49:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-21 00:49:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 00:49:04,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:04,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:04,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:04,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:49:04,657 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:04,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1623423198, now seen corresponding path program 1 times [2021-11-21 00:49:04,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:04,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88568299] [2021-11-21 00:49:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:04,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:04,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:04,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 00:49:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:49:04,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:49:04,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:49:05,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88568299] [2021-11-21 00:49:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88568299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:05,067 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:05,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 00:49:05,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370823018] [2021-11-21 00:49:05,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:05,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:49:05,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:49:05,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:49:05,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:49:05,069 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:49:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:05,180 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-21 00:49:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:49:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-21 00:49:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:05,181 INFO L225 Difference]: With dead ends: 62 [2021-11-21 00:49:05,181 INFO L226 Difference]: Without dead ends: 44 [2021-11-21 00:49:05,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:49:05,183 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:05,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 79 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:49:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-21 00:49:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-11-21 00:49:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2021-11-21 00:49:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-21 00:49:05,191 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 33 [2021-11-21 00:49:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:05,196 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-21 00:49:05,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:49:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-21 00:49:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 00:49:05,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:05,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:05,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:05,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:49:05,432 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:05,433 INFO L85 PathProgramCache]: Analyzing trace with hash 402168875, now seen corresponding path program 1 times [2021-11-21 00:49:05,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:05,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774080720] [2021-11-21 00:49:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:05,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:05,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:05,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:05,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 00:49:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:05,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:49:05,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:49:05,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:49:05,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:05,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774080720] [2021-11-21 00:49:05,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774080720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:05,876 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:05,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 00:49:05,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27843882] [2021-11-21 00:49:05,877 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:05,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:49:05,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:49:05,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:49:05,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:49:05,878 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2021-11-21 00:49:05,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:05,959 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-21 00:49:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:49:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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 34 [2021-11-21 00:49:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:05,963 INFO L225 Difference]: With dead ends: 53 [2021-11-21 00:49:05,964 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 00:49:05,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:49:05,965 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:05,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 98 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:49:05,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 00:49:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-11-21 00:49:05,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 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) [2021-11-21 00:49:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-21 00:49:05,972 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 34 [2021-11-21 00:49:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:05,973 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-21 00:49:05,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2021-11-21 00:49:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-21 00:49:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 00:49:05,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:05,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:05,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:06,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:49:06,189 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:06,190 INFO L85 PathProgramCache]: Analyzing trace with hash -366012659, now seen corresponding path program 1 times [2021-11-21 00:49:06,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:06,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71992623] [2021-11-21 00:49:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:06,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:06,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:06,192 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:06,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 00:49:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-21 00:49:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:06,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:49:06,529 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:49:06,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-21 00:49:06,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:49:06,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:49:07,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:49:07,154 INFO L354 Elim1Store]: treesize reduction 101, result has 14.4 percent of original size [2021-11-21 00:49:07,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 102 [2021-11-21 00:49:07,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 84 [2021-11-21 00:49:07,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:49:07,193 INFO L354 Elim1Store]: treesize reduction 107, result has 9.3 percent of original size [2021-11-21 00:49:07,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 65 [2021-11-21 00:49:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:07,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:49:07,577 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 00:49:07,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2021-11-21 00:49:07,609 INFO L354 Elim1Store]: treesize reduction 55, result has 23.6 percent of original size [2021-11-21 00:49:07,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 62 [2021-11-21 00:49:07,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-11-21 00:49:08,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2021-11-21 00:49:08,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-21 00:49:08,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-21 00:49:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:49:08,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:14,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 222 [2021-11-21 00:49:17,334 INFO L354 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2021-11-21 00:49:17,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 32 [2021-11-21 00:49:17,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 00:49:17,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-21 00:49:17,390 INFO L354 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2021-11-21 00:49:17,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 39 [2021-11-21 00:49:17,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-21 00:49:17,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2021-11-21 00:49:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:18,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:18,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71992623] [2021-11-21 00:49:18,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71992623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:18,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [911574135] [2021-11-21 00:49:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:18,087 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:49:18,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:49:18,104 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:49:18,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-21 00:49:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:18,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-21 00:49:18,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:18,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:49:18,926 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:49:18,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-21 00:49:19,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:49:19,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:49:20,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:49:20,306 INFO L354 Elim1Store]: treesize reduction 105, result has 11.0 percent of original size [2021-11-21 00:49:20,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 91 [2021-11-21 00:49:20,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 79 [2021-11-21 00:49:20,330 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-21 00:49:20,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 63 [2021-11-21 00:49:20,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:20,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 57 [2021-11-21 00:49:20,982 INFO L354 Elim1Store]: treesize reduction 61, result has 23.8 percent of original size [2021-11-21 00:49:20,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 59 [2021-11-21 00:49:20,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:20,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-21 00:49:21,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-21 00:49:21,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-21 00:49:21,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:49:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:49:21,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:26,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 510 treesize of output 466 [2021-11-21 00:49:28,724 INFO L354 Elim1Store]: treesize reduction 24, result has 52.0 percent of original size [2021-11-21 00:49:28,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 80 [2021-11-21 00:49:28,765 INFO L354 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2021-11-21 00:49:28,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 62 [2021-11-21 00:49:28,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-21 00:49:28,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-21 00:49:28,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2021-11-21 00:49:28,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2021-11-21 00:49:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:29,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [911574135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:29,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112828974] [2021-11-21 00:49:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:29,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:29,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:29,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:49:29,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:49:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:29,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-21 00:49:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:29,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:49:29,654 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:49:29,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-21 00:49:29,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:49:29,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:49:29,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:49:30,014 INFO L354 Elim1Store]: treesize reduction 105, result has 11.0 percent of original size [2021-11-21 00:49:30,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 91 [2021-11-21 00:49:30,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 79 [2021-11-21 00:49:30,041 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-21 00:49:30,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 63 [2021-11-21 00:49:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:30,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 57 [2021-11-21 00:49:30,235 INFO L354 Elim1Store]: treesize reduction 61, result has 23.8 percent of original size [2021-11-21 00:49:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 59 [2021-11-21 00:49:30,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:30,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-21 00:49:30,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-21 00:49:30,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-21 00:49:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:49:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:49:30,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:36,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 222 [2021-11-21 00:49:40,545 INFO L354 Elim1Store]: treesize reduction 24, result has 52.0 percent of original size [2021-11-21 00:49:40,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 80 [2021-11-21 00:49:40,585 INFO L354 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2021-11-21 00:49:40,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 62 [2021-11-21 00:49:40,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-21 00:49:40,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-21 00:49:40,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2021-11-21 00:49:40,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2021-11-21 00:49:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:41,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112828974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:41,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:49:41,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20, 20, 20, 20] total 74 [2021-11-21 00:49:41,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730826332] [2021-11-21 00:49:41,867 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:49:41,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-21 00:49:41,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:49:41,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-21 00:49:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=5116, Unknown=4, NotChecked=0, Total=5402 [2021-11-21 00:49:41,874 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 74 states, 74 states have (on average 1.7837837837837838) internal successors, (132), 74 states have internal predecessors, (132), 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) [2021-11-21 00:49:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:48,565 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-11-21 00:49:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 00:49:48,566 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.7837837837837838) internal successors, (132), 74 states have internal predecessors, (132), 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 35 [2021-11-21 00:49:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:48,568 INFO L225 Difference]: With dead ends: 64 [2021-11-21 00:49:48,569 INFO L226 Difference]: Without dead ends: 62 [2021-11-21 00:49:48,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2407 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=978, Invalid=8720, Unknown=4, NotChecked=0, Total=9702 [2021-11-21 00:49:48,575 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 252 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:48,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 399 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 588 Invalid, 0 Unknown, 239 Unchecked, 1.8s Time] [2021-11-21 00:49:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-21 00:49:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-11-21 00:49:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 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) [2021-11-21 00:49:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-21 00:49:48,588 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 35 [2021-11-21 00:49:48,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:48,589 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-21 00:49:48,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.7837837837837838) internal successors, (132), 74 states have internal predecessors, (132), 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) [2021-11-21 00:49:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-21 00:49:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:49:48,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:48,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:48,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:48,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:49,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-21 00:49:49,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:49:49,204 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:49,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1590163563, now seen corresponding path program 2 times [2021-11-21 00:49:49,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:49,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013311036] [2021-11-21 00:49:49,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:49:49,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:49,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:49,208 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:49,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 00:49:49,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:49:49,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:49,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:49:49,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:49:49,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:49:49,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013311036] [2021-11-21 00:49:49,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013311036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:49,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [77363202] [2021-11-21 00:49:49,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:49:49,687 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:49:49,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:49:49,689 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:49:49,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-21 00:49:49,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:49:49,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:49,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:49:49,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:49:49,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:49:50,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [77363202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:50,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370858842] [2021-11-21 00:49:50,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:49:50,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:50,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:50,186 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:49:50,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:49:50,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:49:50,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:50,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:49:50,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:49:50,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:49:50,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370858842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:50,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:49:50,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 15 [2021-11-21 00:49:50,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789294021] [2021-11-21 00:49:50,936 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:49:50,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:49:50,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:49:50,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:49:50,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:49:50,938 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 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) [2021-11-21 00:49:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:51,748 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2021-11-21 00:49:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 00:49:51,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 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 36 [2021-11-21 00:49:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:51,750 INFO L225 Difference]: With dead ends: 115 [2021-11-21 00:49:51,751 INFO L226 Difference]: Without dead ends: 107 [2021-11-21 00:49:51,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:49:51,752 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 209 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:51,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 136 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:49:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-21 00:49:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2021-11-21 00:49:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 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) [2021-11-21 00:49:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-11-21 00:49:51,771 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 36 [2021-11-21 00:49:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:51,772 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-11-21 00:49:51,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 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) [2021-11-21 00:49:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-11-21 00:49:51,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:49:51,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:51,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:51,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:51,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:52,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:52,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:52,377 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash 108045400, now seen corresponding path program 3 times [2021-11-21 00:49:52,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:52,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375585113] [2021-11-21 00:49:52,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:49:52,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:52,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:52,379 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:52,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 00:49:52,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:49:52,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:52,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:49:52,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:49:52,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:49:52,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:52,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375585113] [2021-11-21 00:49:52,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375585113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:52,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [274407134] [2021-11-21 00:49:52,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:49:52,829 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:49:52,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:49:52,830 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:49:52,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-21 00:49:53,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:49:53,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:53,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:49:53,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:49:53,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:49:53,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [274407134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:53,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415883815] [2021-11-21 00:49:53,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:49:53,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:53,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:53,567 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:49:53,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:49:53,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:49:53,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:53,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:49:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:49:54,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:49:54,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415883815] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:49:54,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-21 00:49:54,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6, 7, 6] total 19 [2021-11-21 00:49:54,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991631537] [2021-11-21 00:49:54,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:54,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:54,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:49:54,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:54,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:49:54,239 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2021-11-21 00:49:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:54,353 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2021-11-21 00:49:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:49:54,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 36 [2021-11-21 00:49:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:54,354 INFO L225 Difference]: With dead ends: 103 [2021-11-21 00:49:54,354 INFO L226 Difference]: Without dead ends: 76 [2021-11-21 00:49:54,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:49:54,356 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:54,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 65 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:49:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-21 00:49:54,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-11-21 00:49:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 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) [2021-11-21 00:49:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-11-21 00:49:54,374 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 36 [2021-11-21 00:49:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:54,375 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-11-21 00:49:54,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2021-11-21 00:49:54,375 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-11-21 00:49:54,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:49:54,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:54,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:54,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:54,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:54,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-21 00:49:54,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:54,984 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1465345254, now seen corresponding path program 4 times [2021-11-21 00:49:54,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:54,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491415794] [2021-11-21 00:49:54,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:49:54,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:54,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:54,989 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:54,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 00:49:55,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:49:55,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:49:55,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:49:55,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:49:55,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:55,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491415794] [2021-11-21 00:49:55,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491415794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:55,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [632990057] [2021-11-21 00:49:55,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:49:55,339 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:49:55,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:49:55,340 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:49:55,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-21 00:49:55,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:49:55,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:55,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:49:55,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:49:55,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:49:55,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [632990057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:55,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060624947] [2021-11-21 00:49:55,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:49:55,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:55,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:55,635 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:49:55,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:49:55,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:49:55,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:49:55,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:49:55,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:49:56,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060624947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:56,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:49:56,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 15 [2021-11-21 00:49:56,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307587074] [2021-11-21 00:49:56,173 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:49:56,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:49:56,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:49:56,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:49:56,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:49:56,175 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2021-11-21 00:49:57,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:57,316 INFO L93 Difference]: Finished difference Result 179 states and 213 transitions. [2021-11-21 00:49:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:49:57,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 36 [2021-11-21 00:49:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:57,318 INFO L225 Difference]: With dead ends: 179 [2021-11-21 00:49:57,318 INFO L226 Difference]: Without dead ends: 142 [2021-11-21 00:49:57,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:49:57,320 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 362 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:57,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 155 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:49:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-21 00:49:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2021-11-21 00:49:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 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) [2021-11-21 00:49:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-11-21 00:49:57,342 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 36 [2021-11-21 00:49:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:57,342 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-11-21 00:49:57,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2021-11-21 00:49:57,343 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-11-21 00:49:57,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 00:49:57,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:57,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:57,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:57,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:57,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:57,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:57,948 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash -5958248, now seen corresponding path program 1 times [2021-11-21 00:49:57,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:57,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886689512] [2021-11-21 00:49:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:57,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:57,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:57,950 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:57,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 00:49:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:58,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 00:49:58,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:58,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-21 00:49:58,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:49:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:49:58,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:58,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-21 00:49:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:49:59,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:59,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886689512] [2021-11-21 00:49:59,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886689512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:59,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1927349834] [2021-11-21 00:49:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:59,204 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:49:59,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:49:59,204 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:49:59,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-21 00:49:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:59,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 00:49:59,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:59,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-21 00:50:00,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:50:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:50:00,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:00,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-21 00:50:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:50:00,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1927349834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:00,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486157621] [2021-11-21 00:50:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:00,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:00,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:00,488 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:00,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 00:50:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:00,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 00:50:00,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:00,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-21 00:50:01,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:50:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:50:01,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:02,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-21 00:50:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:50:02,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486157621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:02,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:50:02,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 16, 11, 14, 11] total 40 [2021-11-21 00:50:02,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000921372] [2021-11-21 00:50:02,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:50:02,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-21 00:50:02,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:50:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-21 00:50:02,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:50:02,637 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 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) [2021-11-21 00:50:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:08,661 INFO L93 Difference]: Finished difference Result 194 states and 239 transitions. [2021-11-21 00:50:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-21 00:50:08,662 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 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 41 [2021-11-21 00:50:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:08,664 INFO L225 Difference]: With dead ends: 194 [2021-11-21 00:50:08,664 INFO L226 Difference]: Without dead ends: 149 [2021-11-21 00:50:08,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1800, Invalid=6032, Unknown=0, NotChecked=0, Total=7832 [2021-11-21 00:50:08,668 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 992 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:08,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 192 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 00:50:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-21 00:50:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 82. [2021-11-21 00:50:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 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) [2021-11-21 00:50:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-11-21 00:50:08,694 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 41 [2021-11-21 00:50:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:08,694 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-11-21 00:50:08,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 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) [2021-11-21 00:50:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-11-21 00:50:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 00:50:08,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:08,697 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:08,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-21 00:50:08,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-21 00:50:09,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-21 00:50:09,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:50:09,313 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:09,314 INFO L85 PathProgramCache]: Analyzing trace with hash -574386790, now seen corresponding path program 5 times [2021-11-21 00:50:09,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:50:09,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527882505] [2021-11-21 00:50:09,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 00:50:09,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:50:09,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:50:09,316 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:50:09,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 00:50:09,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:50:09,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:50:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:50:09,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:50:09,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:50:09,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:50:09,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527882505] [2021-11-21 00:50:09,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527882505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:09,616 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:09,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 00:50:09,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986870767] [2021-11-21 00:50:09,617 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:09,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:50:09,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:50:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:50:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:50:09,618 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2021-11-21 00:50:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:09,691 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2021-11-21 00:50:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:50:09,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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 46 [2021-11-21 00:50:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:09,693 INFO L225 Difference]: With dead ends: 112 [2021-11-21 00:50:09,693 INFO L226 Difference]: Without dead ends: 57 [2021-11-21 00:50:09,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:50:09,694 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:09,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 99 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:50:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-21 00:50:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-21 00:50:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 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) [2021-11-21 00:50:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-11-21 00:50:09,709 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 46 [2021-11-21 00:50:09,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:09,710 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-11-21 00:50:09,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2021-11-21 00:50:09,710 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-11-21 00:50:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:50:09,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:09,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:09,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:09,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:50:09,920 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1765447083, now seen corresponding path program 2 times [2021-11-21 00:50:09,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:50:09,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600248222] [2021-11-21 00:50:09,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:50:09,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:50:09,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:50:09,927 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:50:09,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 00:50:10,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:50:10,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:50:10,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:50:10,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:50:10,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:50:10,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:50:10,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600248222] [2021-11-21 00:50:10,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600248222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:10,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [619082849] [2021-11-21 00:50:10,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:50:10,417 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:50:10,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:50:10,417 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:50:10,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-21 00:50:10,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:50:10,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:50:10,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:50:10,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:50:10,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:50:10,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [619082849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:10,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098030979] [2021-11-21 00:50:10,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:50:10,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:10,904 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:10,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-21 00:50:10,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:50:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:50:10,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 00:50:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:50:11,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:50:11,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098030979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:11,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:50:11,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 7] total 17 [2021-11-21 00:50:11,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163686631] [2021-11-21 00:50:11,516 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:50:11,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 00:50:11,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:50:11,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 00:50:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:50:11,518 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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) [2021-11-21 00:50:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:11,933 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-11-21 00:50:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:50:11,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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 48 [2021-11-21 00:50:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:11,934 INFO L225 Difference]: With dead ends: 57 [2021-11-21 00:50:11,934 INFO L226 Difference]: Without dead ends: 0 [2021-11-21 00:50:11,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:50:11,936 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:11,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 176 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:50:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-21 00:50:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-21 00:50:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-21 00:50:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-21 00:50:11,937 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2021-11-21 00:50:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:11,937 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-21 00:50:11,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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) [2021-11-21 00:50:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-21 00:50:11,938 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-21 00:50:11,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:50:11,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:12,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:12,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:12,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:50:12,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-21 00:50:18,668 INFO L861 garLoopResultBuilder]: At program point L572(line 572) the Hoare annotation is: true [2021-11-21 00:50:18,668 INFO L858 garLoopResultBuilder]: For program point L622-2(lines 622 627) no Hoare annotation was computed. [2021-11-21 00:50:18,669 INFO L854 garLoopResultBuilder]: At program point L622-3(lines 622 627) the Hoare annotation is: (let ((.cse13 (bvmul (_ bv2 32) |ULTIMATE.start_main_~len~0#1|))) (let ((.cse0 (= |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv0 32))) (.cse1 (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_update_at_~head#1.offset|)) (.cse2 (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse3 (= (bvadd (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) (_ bv2 32)) .cse13)) (.cse10 (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv1 32))) (.cse4 (= (bvadd |ULTIMATE.start_sll_update_at_~data#1| (_ bv2 32)) .cse13)) (.cse5 (= (_ bv0 32) |ULTIMATE.start_sll_create_#res#1.offset|)) (.cse6 (= (_ bv0 32) |ULTIMATE.start_node_create_~temp~0#1.offset|)) (.cse7 (not (bvsgt |ULTIMATE.start_sll_update_at_~index#1| (_ bv0 32)))) (.cse8 (= (_ bv2 32) |ULTIMATE.start_main_~len~0#1|)) (.cse9 (= |ULTIMATE.start_node_create_#res#1.offset| (_ bv0 32)))) (or (and .cse0 (= (_ bv0 32) |ULTIMATE.start_sll_get_data_at_~index#1|) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~i~0#1| (_ bv0 32)) .cse4 .cse5 .cse6 .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 (= (bvmul (_ bv2 32) |ULTIMATE.start_main_~expected~0#1|) (bvadd (_ bv2 32) (bvmul (_ bv2 32) |ULTIMATE.start_sll_get_data_at_~index#1|) (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|))) .cse3 .cse4 .cse5 (= |ULTIMATE.start_main_~expected~0#1| (_ bv2 32)) (= |ULTIMATE.start_main_~expected~0#1| (bvadd (_ bv2 32) |ULTIMATE.start_sll_get_data_at_~index#1|)) .cse6 (= |ULTIMATE.start_sll_get_data_at_#res#1| (_ bv2 32)) .cse7 .cse8 .cse9 (= .cse10 (_ bv0 32))) (let ((.cse11 (bvadd |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv4 32))) (.cse12 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) (_ bv4 32)))) (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |#valid| |ULTIMATE.start_sll_create_~head~0#1.base|))))) .cse0 .cse1 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse11) (_ bv0 32)) .cse2 .cse3 (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse11) |ULTIMATE.start_sll_create_~head~0#1.base|)) (= |ULTIMATE.start_main_~len~0#1| .cse10) .cse4 .cse5 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res#1.base|))) (_ bv1 1))) .cse6 (= |ULTIMATE.start_main_~s~0#1.offset| (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_~temp~0#1.base|))) (_ bv1 1))) .cse7 .cse8 .cse9 (= .cse12 (_ bv0 32)) (= (bvadd (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) (bvadd |ULTIMATE.start_main_~s~0#1.offset| (_ bv4 32)))) .cse12) (_ bv1 32)) .cse13)))))) [2021-11-21 00:50:18,669 INFO L858 garLoopResultBuilder]: For program point L622-4(lines 622 627) no Hoare annotation was computed. [2021-11-21 00:50:18,669 INFO L854 garLoopResultBuilder]: At program point L581(lines 574 582) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv0 32))) (.cse1 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res#1.base|))) (_ bv1 1)))) (.cse2 (= (_ bv0 32) |ULTIMATE.start_node_create_~temp~0#1.offset|)) (.cse3 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_~temp~0#1.base|))) (_ bv1 1)))) (.cse4 (= (_ bv2 32) |ULTIMATE.start_main_~len~0#1|)) (.cse5 (= |ULTIMATE.start_node_create_#res#1.offset| (_ bv0 32)))) (or (and .cse0 .cse1 .cse2 (= |ULTIMATE.start_sll_create_~len#1| (_ bv2 32)) .cse3 .cse4 .cse5) (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |#valid| |ULTIMATE.start_sll_create_~head~0#1.base|))))) (bvsgt |ULTIMATE.start_sll_create_~len#1| (_ bv0 32)) .cse0 (not (= |ULTIMATE.start_node_create_#res#1.base| |ULTIMATE.start_sll_create_~head~0#1.base|)) .cse1 .cse2 .cse3 .cse4 .cse5 (not (= |ULTIMATE.start_node_create_~temp~0#1.base| |ULTIMATE.start_sll_create_~head~0#1.base|))))) [2021-11-21 00:50:18,669 INFO L858 garLoopResultBuilder]: For program point L606(lines 606 612) no Hoare annotation was computed. [2021-11-21 00:50:18,669 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-21 00:50:18,670 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-21 00:50:18,670 INFO L861 garLoopResultBuilder]: At program point L631(lines 613 632) the Hoare annotation is: true [2021-11-21 00:50:18,670 INFO L854 garLoopResultBuilder]: At program point L590(lines 583 591) the Hoare annotation is: (let ((.cse0 (bvadd |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv4 32)))) (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |#valid| |ULTIMATE.start_sll_create_~head~0#1.base|))))) (= |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv0 32)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_#res#1.base|) (_ bv4 32)) (_ bv0 32)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) (_ bv0 32)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) |ULTIMATE.start_sll_create_~head~0#1.base|)) (= (_ bv0 32) |ULTIMATE.start_sll_create_#res#1.offset|) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res#1.base|))) (_ bv1 1))) (= (_ bv0 32) |ULTIMATE.start_node_create_~temp~0#1.offset|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_#res#1.base|) (_ bv4 32)) |ULTIMATE.start_sll_create_#res#1.base|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_~temp~0#1.base|))) (_ bv1 1))) (= (_ bv2 32) |ULTIMATE.start_main_~len~0#1|) (= |ULTIMATE.start_node_create_#res#1.offset| (_ bv0 32)))) [2021-11-21 00:50:18,670 INFO L854 garLoopResultBuilder]: At program point L607-2(lines 607 610) the Hoare annotation is: (let ((.cse21 (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse17 (select .cse21 (_ bv4 32))) (.cse22 (bvadd |ULTIMATE.start_main_~s~0#1.offset| (_ bv4 32))) (.cse6 (bvmul (_ bv2 32) |ULTIMATE.start_main_~len~0#1|)) (.cse23 (bvadd |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv4 32))) (.cse24 (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse2 (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_update_at_~head#1.offset|)) (.cse4 (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse13 (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_sll_update_at_~index#1|)) (.cse0 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |#valid| |ULTIMATE.start_sll_create_~head~0#1.base|)))))) (.cse1 (= |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv0 32))) (.cse18 (not (= |ULTIMATE.start_main_~s~0#1.base| (select .cse24 (_ bv4 32))))) (.cse3 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse23) (_ bv0 32))) (.cse19 (= (bvadd |ULTIMATE.start_sll_update_at_~data#1| (_ bv1 32)) .cse6)) (.cse12 (select .cse24 .cse22)) (.cse5 (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse23) |ULTIMATE.start_sll_create_~head~0#1.base|))) (.cse20 (= |ULTIMATE.start_main_~len~0#1| (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv1 32)))) (.cse7 (= (_ bv0 32) |ULTIMATE.start_sll_create_#res#1.offset|)) (.cse8 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res#1.base|))) (_ bv1 1)))) (.cse9 (= (_ bv0 32) |ULTIMATE.start_node_create_~temp~0#1.offset|)) (.cse10 (= |ULTIMATE.start_main_~s~0#1.offset| (_ bv0 32))) (.cse11 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_~temp~0#1.base|))) (_ bv1 1)))) (.cse14 (= (_ bv2 32) |ULTIMATE.start_main_~len~0#1|)) (.cse15 (= |ULTIMATE.start_node_create_#res#1.offset| (_ bv0 32))) (.cse16 (= .cse17 (_ bv0 32)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= (bvadd |ULTIMATE.start_sll_update_at_~data#1| (_ bv2 32)) .cse6) .cse7 .cse8 .cse9 .cse10 .cse11 (not (= .cse12 |ULTIMATE.start_main_~s~0#1.base|)) .cse13 .cse14 .cse15 (= |ULTIMATE.start_main_~len~0#1| (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv2 32))) .cse16 (= (bvadd (select (select |#memory_int| .cse12) .cse17) (_ bv1 32)) .cse6)) (and .cse0 .cse1 .cse2 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_#res#1.base|) (_ bv4 32)) (_ bv0 32)) .cse18 .cse3 .cse4 .cse19 .cse5 .cse20 .cse7 .cse8 .cse9 (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_#res#1.base|) (_ bv4 32)) |ULTIMATE.start_sll_create_#res#1.base|)) .cse10 .cse11 .cse13 .cse14 .cse15 .cse16) (and (= |ULTIMATE.start_sll_update_at_~index#1| (_ bv0 32)) .cse0 .cse1 .cse18 .cse3 .cse19 (= .cse12 |ULTIMATE.start_sll_update_at_~head#1.base|) .cse5 .cse20 .cse7 .cse8 .cse9 .cse10 (= |ULTIMATE.start_sll_update_at_~head#1.offset| (select .cse21 .cse22)) .cse11 .cse14 .cse15 .cse16))))) [2021-11-21 00:50:18,671 INFO L858 garLoopResultBuilder]: For program point L607-3(lines 607 610) no Hoare annotation was computed. [2021-11-21 00:50:18,671 INFO L858 garLoopResultBuilder]: For program point L624(lines 624 626) no Hoare annotation was computed. [2021-11-21 00:50:18,671 INFO L854 garLoopResultBuilder]: At program point L600-2(lines 600 603) the Hoare annotation is: (let ((.cse16 (bvmul (_ bv2 32) |ULTIMATE.start_main_~len~0#1|))) (let ((.cse0 (= |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv0 32))) (.cse1 (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_update_at_~head#1.offset|)) (.cse3 (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse5 (= (bvadd (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) (_ bv2 32)) .cse16)) (.cse6 (= (bvadd |ULTIMATE.start_sll_update_at_~data#1| (_ bv2 32)) .cse16)) (.cse7 (= (_ bv0 32) |ULTIMATE.start_sll_create_#res#1.offset|)) (.cse9 (= (_ bv0 32) |ULTIMATE.start_node_create_~temp~0#1.offset|)) (.cse10 (= |ULTIMATE.start_main_~s~0#1.offset| (_ bv0 32))) (.cse19 (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|)) (.cse11 (not (bvsgt |ULTIMATE.start_sll_update_at_~index#1| (_ bv0 32)))) (.cse12 (= (_ bv2 32) |ULTIMATE.start_main_~len~0#1|)) (.cse13 (= |ULTIMATE.start_node_create_#res#1.offset| (_ bv0 32))) (.cse17 (= |ULTIMATE.start_sll_get_data_at_~head#1.offset| (_ bv0 32)))) (or (let ((.cse2 (bvadd |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv4 32))) (.cse8 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (_ bv4 32))) (.cse4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (_ bv4 32))) (.cse15 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) (_ bv4 32)))) (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |#valid| |ULTIMATE.start_sll_create_~head~0#1.base|))))) .cse0 (= |ULTIMATE.start_main_~i~0#1| (_ bv1 32)) (= (_ bv1 32) |ULTIMATE.start_sll_get_data_at_~index#1|) .cse1 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse2) (_ bv0 32)) .cse3 (= .cse4 (_ bv0 32)) .cse5 (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse2) |ULTIMATE.start_sll_create_~head~0#1.base|)) .cse6 .cse7 (not (= |ULTIMATE.start_sll_get_data_at_~head#1.base| .cse8)) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res#1.base|))) (_ bv1 1))) .cse9 .cse10 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_~temp~0#1.base|))) (_ bv1 1))) .cse11 .cse12 .cse13 (exists ((|ULTIMATE.start_main_~i~0#1| (_ BitVec 32))) (let ((.cse14 (bvadd (bvmul (_ bv2 32) |ULTIMATE.start_main_~i~0#1|) (_ bv1 32)))) (and (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (_ bv4 32))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (_ bv4 32))) .cse14) (= |ULTIMATE.start_main_~expected~0#1| .cse14)))) (= (select (select |#memory_int| .cse8) .cse4) (_ bv3 32)) (= .cse15 (_ bv0 32)) (= (bvadd (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) (bvadd |ULTIMATE.start_main_~s~0#1.offset| (_ bv4 32)))) .cse15) (_ bv1 32)) .cse16) .cse17)) (let ((.cse18 (bvmul (_ bv2 32) |ULTIMATE.start_sll_get_data_at_~index#1|))) (and .cse0 .cse1 .cse3 (= |ULTIMATE.start_main_~expected~0#1| (bvadd (_ bv2 32) .cse18)) (= (bvmul (_ bv2 32) |ULTIMATE.start_main_~expected~0#1|) (bvadd (_ bv2 32) .cse18 .cse19)) .cse5 .cse6 .cse7 (= |ULTIMATE.start_main_~expected~0#1| (bvadd (_ bv2 32) |ULTIMATE.start_sll_get_data_at_~index#1|)) .cse9 .cse11 .cse12 .cse13 (= |ULTIMATE.start_main_~len~0#1| (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv2 32))))) (and .cse0 (= (_ bv0 32) |ULTIMATE.start_sll_get_data_at_~index#1|) .cse1 .cse3 .cse5 (= |ULTIMATE.start_main_~len~0#1| (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv1 32))) .cse6 .cse7 .cse9 (= |ULTIMATE.start_main_~expected~0#1| (_ bv3 32)) .cse10 (= (_ bv3 32) .cse19) .cse11 .cse12 .cse13 .cse17)))) [2021-11-21 00:50:18,671 INFO L858 garLoopResultBuilder]: For program point L600-3(lines 600 603) no Hoare annotation was computed. [2021-11-21 00:50:18,672 INFO L854 garLoopResultBuilder]: At program point L625(lines 613 632) the Hoare annotation is: false [2021-11-21 00:50:18,672 INFO L858 garLoopResultBuilder]: For program point L592(lines 592 598) no Hoare annotation was computed. [2021-11-21 00:50:18,672 INFO L858 garLoopResultBuilder]: For program point L576(lines 576 578) no Hoare annotation was computed. [2021-11-21 00:50:18,672 INFO L858 garLoopResultBuilder]: For program point L576-1(lines 576 578) no Hoare annotation was computed. [2021-11-21 00:50:18,672 INFO L861 garLoopResultBuilder]: At program point L593-2(lines 593 597) the Hoare annotation is: true [2021-11-21 00:50:18,673 INFO L858 garLoopResultBuilder]: For program point L618-2(lines 618 621) no Hoare annotation was computed. [2021-11-21 00:50:18,673 INFO L858 garLoopResultBuilder]: For program point L585-2(lines 585 589) no Hoare annotation was computed. [2021-11-21 00:50:18,673 INFO L854 garLoopResultBuilder]: At program point L618-3(lines 618 621) the Hoare annotation is: (let ((.cse10 (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|)) (.cse17 (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|)) (.cse11 (bvadd |ULTIMATE.start_main_~s~0#1.offset| (_ bv4 32)))) (let ((.cse4 (select .cse17 .cse11)) (.cse3 (bvmul (_ bv2 32) |ULTIMATE.start_main_~len~0#1|)) (.cse19 (select .cse10 (_ bv4 32))) (.cse20 (bvadd |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv4 32)))) (let ((.cse0 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |#valid| |ULTIMATE.start_sll_create_~head~0#1.base|)))))) (.cse1 (= |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv0 32))) (.cse2 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse20) (_ bv0 32))) (.cse5 (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse20) |ULTIMATE.start_sll_create_~head~0#1.base|))) (.cse6 (= (_ bv0 32) |ULTIMATE.start_sll_create_#res#1.offset|)) (.cse7 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res#1.base|))) (_ bv1 1)))) (.cse8 (= (_ bv0 32) |ULTIMATE.start_node_create_~temp~0#1.offset|)) (.cse9 (= |ULTIMATE.start_main_~s~0#1.offset| (_ bv0 32))) (.cse12 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_~temp~0#1.base|))) (_ bv1 1)))) (.cse13 (= (_ bv2 32) |ULTIMATE.start_main_~len~0#1|)) (.cse14 (= |ULTIMATE.start_node_create_#res#1.offset| (_ bv0 32))) (.cse15 (= .cse19 (_ bv0 32))) (.cse18 (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv1 32))) (.cse16 (= (bvadd (select (select |#memory_int| .cse4) .cse19) (_ bv1 32)) .cse3))) (or (and (= |ULTIMATE.start_sll_update_at_~index#1| (_ bv0 32)) .cse0 .cse1 .cse2 (= (bvadd |ULTIMATE.start_sll_update_at_~data#1| (_ bv1 32)) .cse3) (= .cse4 |ULTIMATE.start_sll_update_at_~head#1.base|) .cse5 .cse6 .cse7 .cse8 .cse9 (= |ULTIMATE.start_sll_update_at_~head#1.offset| (select .cse10 .cse11)) .cse12 (not (= .cse4 |ULTIMATE.start_main_~s~0#1.base|)) .cse13 .cse14 (= |ULTIMATE.start_main_~len~0#1| (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv2 32))) .cse15 .cse16) (and .cse0 .cse1 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_#res#1.base|) (_ bv4 32)) (_ bv0 32)) (not (= |ULTIMATE.start_main_~s~0#1.base| (select .cse17 (_ bv4 32)))) .cse2 .cse5 (= |ULTIMATE.start_main_~len~0#1| .cse18) .cse6 .cse7 .cse8 (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_#res#1.base|) (_ bv4 32)) |ULTIMATE.start_sll_create_#res#1.base|)) .cse9 .cse12 .cse13 .cse14 .cse15) (and (= |ULTIMATE.start_main_~len~0#1| (bvadd (_ bv2 32) |ULTIMATE.start_sll_update_at_~index#1|)) .cse0 .cse1 (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_update_at_~head#1.offset|) .cse2 (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_update_at_~head#1.base|) (= (bvadd (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) (_ bv2 32)) .cse3) .cse5 (= (bvadd |ULTIMATE.start_sll_update_at_~data#1| (_ bv2 32)) .cse3) .cse6 .cse7 .cse8 .cse9 .cse12 .cse13 .cse14 .cse15 (= .cse18 (_ bv0 32)) .cse16))))) [2021-11-21 00:50:18,673 INFO L854 garLoopResultBuilder]: At program point L585-3(lines 585 589) the Hoare annotation is: (let ((.cse0 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |#valid| |ULTIMATE.start_sll_create_~head~0#1.base|)))))) (.cse1 (= |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv0 32))) (.cse3 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_#res#1.base|))) (_ bv1 1)))) (.cse4 (= (_ bv0 32) |ULTIMATE.start_node_create_~temp~0#1.offset|)) (.cse5 (= (_ bv0 1) (bvadd (bvneg (bvneg (select |#valid| |ULTIMATE.start_node_create_~temp~0#1.base|))) (_ bv1 1)))) (.cse6 (= (_ bv2 32) |ULTIMATE.start_main_~len~0#1|)) (.cse7 (= |ULTIMATE.start_node_create_#res#1.offset| (_ bv0 32)))) (or (let ((.cse2 (bvadd |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv4 32)))) (and .cse0 .cse1 (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse2) (_ bv0 32)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_create_~head~0#1.base|) .cse2) |ULTIMATE.start_sll_create_~head~0#1.base|)) .cse3 .cse4 .cse5 .cse6 .cse7)) (and .cse1 (= |ULTIMATE.start_sll_create_~len#1| (_ bv2 32)) .cse6) (and .cse0 (bvsgt |ULTIMATE.start_sll_create_~len#1| (_ bv0 32)) .cse1 .cse3 .cse4 .cse5 .cse6 .cse7))) [2021-11-21 00:50:18,674 INFO L858 garLoopResultBuilder]: For program point L618-4(lines 618 621) no Hoare annotation was computed. [2021-11-21 00:50:18,674 INFO L858 garLoopResultBuilder]: For program point L585-4(lines 585 589) no Hoare annotation was computed. [2021-11-21 00:50:18,674 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-21 00:50:18,674 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 630) no Hoare annotation was computed. [2021-11-21 00:50:18,674 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-21 00:50:18,675 INFO L854 garLoopResultBuilder]: At program point L604(lines 599 605) the Hoare annotation is: (let ((.cse11 (bvmul (_ bv2 32) |ULTIMATE.start_main_~len~0#1|))) (let ((.cse0 (= |ULTIMATE.start_sll_create_~head~0#1.offset| (_ bv0 32))) (.cse1 (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_update_at_~head#1.offset|)) (.cse2 (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse4 (= (bvadd (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) (_ bv2 32)) .cse11)) (.cse5 (= (bvadd |ULTIMATE.start_sll_update_at_~data#1| (_ bv2 32)) .cse11)) (.cse6 (= (_ bv0 32) |ULTIMATE.start_sll_create_#res#1.offset|)) (.cse7 (= (_ bv0 32) |ULTIMATE.start_node_create_~temp~0#1.offset|)) (.cse3 (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|)) (.cse8 (not (bvsgt |ULTIMATE.start_sll_update_at_~index#1| (_ bv0 32)))) (.cse9 (= (_ bv2 32) |ULTIMATE.start_main_~len~0#1|)) (.cse10 (= |ULTIMATE.start_node_create_#res#1.offset| (_ bv0 32)))) (or (and .cse0 .cse1 .cse2 (= (bvmul (_ bv2 32) |ULTIMATE.start_main_~expected~0#1|) (bvadd (_ bv2 32) (bvmul (_ bv2 32) |ULTIMATE.start_sll_get_data_at_~index#1|) .cse3)) .cse4 (= |ULTIMATE.start_main_~i~0#1| (_ bv0 32)) .cse5 .cse6 (= |ULTIMATE.start_main_~expected~0#1| (bvadd (_ bv2 32) |ULTIMATE.start_sll_get_data_at_~index#1|)) .cse7 (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (= |ULTIMATE.start_sll_get_data_at_#res#1| (_ bv2 32)) .cse8 .cse9 .cse10) (and .cse0 (= (_ bv0 32) |ULTIMATE.start_sll_get_data_at_~index#1|) .cse1 .cse2 .cse4 (= |ULTIMATE.start_main_~len~0#1| (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv1 32))) .cse5 .cse6 .cse7 (= |ULTIMATE.start_main_~expected~0#1| (_ bv3 32)) (= |ULTIMATE.start_main_~s~0#1.offset| (_ bv0 32)) (= (_ bv3 32) .cse3) .cse8 .cse9 .cse10 (= |ULTIMATE.start_sll_get_data_at_#res#1| (_ bv3 32)) (= |ULTIMATE.start_sll_get_data_at_~head#1.offset| (_ bv0 32)))))) [2021-11-21 00:50:18,678 INFO L732 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1, 1, 1, 1] [2021-11-21 00:50:18,679 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:50:18,687 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: translation of (bvneg (_ BitVec 1) (_ BitVec 1)) not yet implemented, please contact Matthias at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:211) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:192) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:50:18,689 INFO L158 Benchmark]: Toolchain (without parser) took 77349.61ms. Allocated memory was 60.8MB in the beginning and 102.8MB in the end (delta: 41.9MB). Free memory was 39.2MB in the beginning and 26.6MB in the end (delta: 12.6MB). Peak memory consumption was 60.9MB. Max. memory is 16.1GB. [2021-11-21 00:50:18,690 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 60.8MB. Free memory is still 41.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:50:18,690 INFO L158 Benchmark]: CACSL2BoogieTranslator took 637.44ms. Allocated memory is still 60.8MB. Free memory was 39.1MB in the beginning and 36.1MB in the end (delta: 3.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 00:50:18,690 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.36ms. Allocated memory is still 60.8MB. Free memory was 36.1MB in the beginning and 33.8MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:50:18,691 INFO L158 Benchmark]: Boogie Preprocessor took 35.87ms. Allocated memory is still 60.8MB. Free memory was 33.8MB in the beginning and 32.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:50:18,691 INFO L158 Benchmark]: RCFGBuilder took 564.55ms. Allocated memory was 60.8MB in the beginning and 83.9MB in the end (delta: 23.1MB). Free memory was 32.0MB in the beginning and 62.5MB in the end (delta: -30.5MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2021-11-21 00:50:18,692 INFO L158 Benchmark]: TraceAbstraction took 76055.52ms. Allocated memory was 83.9MB in the beginning and 102.8MB in the end (delta: 18.9MB). Free memory was 62.1MB in the beginning and 26.6MB in the end (delta: 35.5MB). Peak memory consumption was 61.8MB. Max. memory is 16.1GB. [2021-11-21 00:50:18,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 60.8MB. Free memory is still 41.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 637.44ms. Allocated memory is still 60.8MB. Free memory was 39.1MB in the beginning and 36.1MB in the end (delta: 3.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.36ms. Allocated memory is still 60.8MB. Free memory was 36.1MB in the beginning and 33.8MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.87ms. Allocated memory is still 60.8MB. Free memory was 33.8MB in the beginning and 32.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 564.55ms. Allocated memory was 60.8MB in the beginning and 83.9MB in the end (delta: 23.1MB). Free memory was 32.0MB in the beginning and 62.5MB in the end (delta: -30.5MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * TraceAbstraction took 76055.52ms. Allocated memory was 83.9MB in the beginning and 102.8MB in the end (delta: 18.9MB). Free memory was 62.1MB in the beginning and 26.6MB in the end (delta: 35.5MB). Peak memory consumption was 61.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 630]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 76.0s, OverallIterations: 12, TraceHistogramMax: 4, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 15.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2076 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2076 mSDsluCounter, 1544 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 239 IncrementalHoareTripleChecker+Unchecked, 1276 mSDsCounter, 706 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1459 IncrementalHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 706 mSolverCounterUnsat, 268 mSDtfsCounter, 1459 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1800 GetRequests, 1482 SyntacticMatches, 2 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4715 ImplicationChecksByTransitivity, 42.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=9, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 196 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 12 PreInvPairs, 32 NumberOfFragments, 1725 HoareAnnotationTreeSize, 12 FomulaSimplifications, 2316 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 6390 FormulaSimplificationTreeSizeReductionInter, 6.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 45.6s InterpolantComputationTime, 858 NumberOfCodeBlocks, 823 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 1668 ConstructedInterpolants, 44 QuantifiedInterpolants, 12480 SizeOfPredicates, 255 NumberOfNonLiveVariables, 2965 ConjunctsInSsa, 348 ConjunctsInUnsatCore, 48 InterpolantComputations, 13 PerfectInterpolantSequences, 763/1004 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: 1 - ExceptionOrErrorResult: UnsupportedOperationException: translation of (bvneg (_ BitVec 1) (_ BitVec 1)) not yet implemented, please contact Matthias de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: translation of (bvneg (_ BitVec 1) (_ BitVec 1)) not yet implemented, please contact Matthias: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:211) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-21 00:50:18,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9824cb4a-6089-400b-a9c0-c28ea3747cb2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: translation of (bvneg (_ BitVec 1) (_ BitVec 1)) not yet implemented, please contact Matthias