./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8 --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 74bed2c5921e53f16e234cbc0a2deaaf4b0b51c6cc3f20bfab2fd33a0fce7ecf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:55:58,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:55:58,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:55:58,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:55:58,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:55:58,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:55:58,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:55:58,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:55:58,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:55:58,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:55:58,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:55:58,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:55:58,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:55:58,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:55:58,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:55:58,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:55:58,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:55:58,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:55:58,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:55:58,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:55:58,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:55:58,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:55:58,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:55:58,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:55:58,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:55:58,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:55:58,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:55:58,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:55:58,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:55:58,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:55:58,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:55:58,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:55:58,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:55:58,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:55:58,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:55:58,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:55:58,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:55:58,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:55:58,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:55:58,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:55:58,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:55:58,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:55:58,251 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:55:58,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:55:58,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:55:58,252 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:55:58,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:55:58,253 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:55:58,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:55:58,253 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:55:58,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:55:58,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:55:58,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:55:58,254 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:55:58,254 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:55:58,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:55:58,255 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:55:58,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:55:58,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:55:58,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:55:58,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:55:58,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:55:58,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:55:58,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:55:58,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:55:58,258 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:55:58,258 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:55:58,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:55:58,258 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:55:58,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:55:58,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:55:58,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:55:58,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:58,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:55:58,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:55:58,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:55:58,260 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:55:58,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:55:58,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:55:58,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:55:58,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:55:58,264 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_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74bed2c5921e53f16e234cbc0a2deaaf4b0b51c6cc3f20bfab2fd33a0fce7ecf [2021-11-07 00:55:58,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:55:58,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:55:58,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:55:58,601 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:55:58,602 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:55:58,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c [2021-11-07 00:55:58,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/data/2604423c7/6068cde5b25c462c977146e20a6f80ba/FLAG889f7f2a0 [2021-11-07 00:55:59,108 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:55:59,109 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c [2021-11-07 00:55:59,126 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/data/2604423c7/6068cde5b25c462c977146e20a6f80ba/FLAG889f7f2a0 [2021-11-07 00:55:59,144 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/data/2604423c7/6068cde5b25c462c977146e20a6f80ba [2021-11-07 00:55:59,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:55:59,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:55:59,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:59,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:55:59,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:55:59,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a432d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59, skipping insertion in model container [2021-11-07 00:55:59,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:55:59,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:55:59,358 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c[525,538] [2021-11-07 00:55:59,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:59,402 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:55:59,415 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c[525,538] [2021-11-07 00:55:59,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:59,446 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:55:59,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59 WrapperNode [2021-11-07 00:55:59,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:59,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:55:59,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:55:59,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:55:59,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:55:59,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:55:59,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:55:59,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:55:59,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:55:59,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:55:59,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:55:59,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:55:59,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (1/1) ... [2021-11-07 00:55:59,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:59,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:55:59,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:55:59,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:55:59,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 00:55:59,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:55:59,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:55:59,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:56:00,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:56:00,217 INFO L299 CfgBuilder]: Removed 28 assume(true) statements. [2021-11-07 00:56:00,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:00 BoogieIcfgContainer [2021-11-07 00:56:00,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:56:00,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:56:00,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:56:00,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:56:00,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:55:59" (1/3) ... [2021-11-07 00:56:00,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bc04b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:00, skipping insertion in model container [2021-11-07 00:56:00,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:59" (2/3) ... [2021-11-07 00:56:00,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bc04b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:56:00, skipping insertion in model container [2021-11-07 00:56:00,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:56:00" (3/3) ... [2021-11-07 00:56:00,236 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound10.c [2021-11-07 00:56:00,242 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:56:00,242 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-07 00:56:00,292 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:56:00,298 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 [2021-11-07 00:56:00,299 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-07 00:56:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 32 states have (on average 1.6875) internal successors, (54), 41 states have internal predecessors, (54), 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) [2021-11-07 00:56:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 00:56:00,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:00,319 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 00:56:00,320 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 00:56:00,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:00,326 INFO L85 PathProgramCache]: Analyzing trace with hash 188707214, now seen corresponding path program 1 times [2021-11-07 00:56:00,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:00,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077875035] [2021-11-07 00:56:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:00,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:00,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:00,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077875035] [2021-11-07 00:56:00,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077875035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:00,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:00,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 00:56:00,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265379579] [2021-11-07 00:56:00,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:56:00,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:56:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:56:00,584 INFO L87 Difference]: Start difference. First operand has 42 states, 32 states have (on average 1.6875) internal successors, (54), 41 states have internal predecessors, (54), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-07 00:56:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:00,608 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2021-11-07 00:56:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:56:00,609 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 00:56:00,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:00,620 INFO L225 Difference]: With dead ends: 81 [2021-11-07 00:56:00,621 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 00:56:00,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:56:00,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 00:56:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-07 00:56:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 39 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) [2021-11-07 00:56:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-07 00:56:00,663 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 5 [2021-11-07 00:56:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:00,664 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-07 00:56:00,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-07 00:56:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-07 00:56:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 00:56:00,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:00,665 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 00:56:00,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 00:56:00,666 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 00:56:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1426196737, now seen corresponding path program 1 times [2021-11-07 00:56:00,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:00,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121329283] [2021-11-07 00:56:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:00,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:01,109 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:01,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121329283] [2021-11-07 00:56:01,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121329283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:01,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:01,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:56:01,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352878969] [2021-11-07 00:56:01,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:56:01,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:01,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:56:01,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:56:01,118 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:10,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:10,216 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-11-07 00:56:10,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:56:10,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 00:56:10,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:10,219 INFO L225 Difference]: With dead ends: 115 [2021-11-07 00:56:10,219 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 00:56:10,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:56:10,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 00:56:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2021-11-07 00:56:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 54 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) [2021-11-07 00:56:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-11-07 00:56:10,241 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 6 [2021-11-07 00:56:10,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:10,242 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-11-07 00:56:10,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:10,242 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-11-07 00:56:10,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 00:56:10,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:10,243 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:10,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 00:56:10,244 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 00:56:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash 480653316, now seen corresponding path program 1 times [2021-11-07 00:56:10,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:10,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234769303] [2021-11-07 00:56:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:10,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:10,269 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:10,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716012668] [2021-11-07 00:56:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:10,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:10,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:10,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:10,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 00:56:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:10,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:56:10,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:10,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:11,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:11,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234769303] [2021-11-07 00:56:11,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:56:11,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716012668] [2021-11-07 00:56:11,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716012668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:11,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:11,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:11,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43888842] [2021-11-07 00:56:11,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:56:11,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:56:11,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:56:11,297 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-07 00:56:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:20,508 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2021-11-07 00:56:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:56:20,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 00:56:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:20,510 INFO L225 Difference]: With dead ends: 93 [2021-11-07 00:56:20,510 INFO L226 Difference]: Without dead ends: 77 [2021-11-07 00:56:20,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-07 00:56:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-11-07 00:56:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 69 states have internal predecessors, (76), 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) [2021-11-07 00:56:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-11-07 00:56:20,532 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 8 [2021-11-07 00:56:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:20,533 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-11-07 00:56:20,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-07 00:56:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-11-07 00:56:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 00:56:20,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:20,534 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:20,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:20,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:20,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 00:56:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash 522498748, now seen corresponding path program 1 times [2021-11-07 00:56:20,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:20,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240476095] [2021-11-07 00:56:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:20,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 00:56:20,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:20,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240476095] [2021-11-07 00:56:20,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240476095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:20,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:20,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:56:20,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803675684] [2021-11-07 00:56:20,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:56:20,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:56:20,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:56:20,988 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2021-11-07 00:56:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:32,860 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-11-07 00:56:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:56:32,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 8 [2021-11-07 00:56:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:32,862 INFO L225 Difference]: With dead ends: 76 [2021-11-07 00:56:32,862 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 00:56:32,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:56:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 00:56:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2021-11-07 00:56:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 69 states have internal predecessors, (75), 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) [2021-11-07 00:56:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2021-11-07 00:56:32,876 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 8 [2021-11-07 00:56:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:32,876 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2021-11-07 00:56:32,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2021-11-07 00:56:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2021-11-07 00:56:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 00:56:32,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:32,878 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:56:32,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 00:56:32,878 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 00:56:32,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:32,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1948474457, now seen corresponding path program 1 times [2021-11-07 00:56:32,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:56:32,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396646936] [2021-11-07 00:56:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:32,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:56:32,891 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:56:32,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479479457] [2021-11-07 00:56:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:32,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:56:32,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:56:32,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:56:32,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 00:56:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:32,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 00:56:32,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:33,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:35,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:56:35,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396646936] [2021-11-07 00:56:35,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:56:35,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479479457] [2021-11-07 00:56:35,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479479457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:35,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:35,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:56:35,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265797872] [2021-11-07 00:56:35,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:56:35,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:56:35,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:56:35,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:56:35,474 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:13,994 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-07 00:57:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:57:13,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 00:57:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:13,996 INFO L225 Difference]: With dead ends: 85 [2021-11-07 00:57:13,996 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 00:57:13,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=18, Invalid=22, Unknown=2, NotChecked=0, Total=42 [2021-11-07 00:57:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 00:57:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-07 00:57:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 64 states have internal predecessors, (69), 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) [2021-11-07 00:57:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-11-07 00:57:14,007 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 10 [2021-11-07 00:57:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:14,008 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-11-07 00:57:14,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-11-07 00:57:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 00:57:14,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:14,009 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:14,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:14,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:57:14,215 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 00:57:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:14,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1766119075, now seen corresponding path program 1 times [2021-11-07 00:57:14,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:57:14,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753514624] [2021-11-07 00:57:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:14,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:57:14,237 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:57:14,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876742391] [2021-11-07 00:57:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:14,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:57:14,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:57:14,249 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:57:14,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 00:57:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:14,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:14,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:57:14,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:16,600 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~q~0 Int) (ULTIMATE.start_main_~r~0 Int) (ULTIMATE.start_main_~n~0 Int)) (= (mod (let ((.cse0 (* c_ULTIMATE.start_main_~h~0 12))) (+ (* (* (* ULTIMATE.start_main_~n~0 16) c_ULTIMATE.start_main_~p~0) ULTIMATE.start_main_~q~0) (* (* (* .cse0 ULTIMATE.start_main_~n~0) ULTIMATE.start_main_~q~0) 4294967295) (* (* c_ULTIMATE.start_main_~h~0 c_ULTIMATE.start_main_~h~0) c_ULTIMATE.start_main_~h~0) (* (* (* c_ULTIMATE.start_main_~h~0 ULTIMATE.start_main_~q~0) ULTIMATE.start_main_~q~0) 4294967295) (* (* (* (* c_ULTIMATE.start_main_~p~0 4) ULTIMATE.start_main_~q~0) ULTIMATE.start_main_~q~0) 4294967295) (* (* (* (* c_ULTIMATE.start_main_~p~0 16) ULTIMATE.start_main_~q~0) ULTIMATE.start_main_~r~0) 4294967295) (* (* .cse0 ULTIMATE.start_main_~q~0) ULTIMATE.start_main_~r~0))) 4294967296) 0)) is different from false [2021-11-07 00:57:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:57:17,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:57:17,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753514624] [2021-11-07 00:57:17,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:57:17,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876742391] [2021-11-07 00:57:17,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876742391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:17,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:17,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:57:17,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287664359] [2021-11-07 00:57:17,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:57:17,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:57:17,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:57:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2021-11-07 00:57:17,436 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:20,809 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-11-07 00:57:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:57:20,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 00:57:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:20,810 INFO L225 Difference]: With dead ends: 69 [2021-11-07 00:57:20,811 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 00:57:20,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=11, Invalid=12, Unknown=1, NotChecked=6, Total=30 [2021-11-07 00:57:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 00:57:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2021-11-07 00:57:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 54 states have internal predecessors, (56), 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) [2021-11-07 00:57:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-11-07 00:57:20,819 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 14 [2021-11-07 00:57:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:20,820 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-11-07 00:57:20,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:20,820 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-11-07 00:57:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 00:57:20,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:20,821 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:20,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 00:57:21,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:57:21,035 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 00:57:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:21,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1311347808, now seen corresponding path program 1 times [2021-11-07 00:57:21,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:57:21,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033326345] [2021-11-07 00:57:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:21,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:57:21,043 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:57:21,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801308176] [2021-11-07 00:57:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:21,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:57:21,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:57:21,045 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:57:21,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b95f747e-ad52-4d45-90a5-b14bc5e0d07b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process