./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i --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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/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 ab65f956ab163b80526b0084797effd91e1aac547effeb9a1fdab821fa279e8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:24:32,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:24:32,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:24:32,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:24:32,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:24:32,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:24:32,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:24:32,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:24:32,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:24:32,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:24:32,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:24:32,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:24:32,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:24:32,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:24:32,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:24:32,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:24:32,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:24:32,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:24:32,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:24:32,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:24:32,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:24:32,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:24:32,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:24:32,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:24:32,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:24:32,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:24:32,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:24:32,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:24:32,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:24:32,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:24:32,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:24:32,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:24:32,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:24:32,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:24:32,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:24:32,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:24:32,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:24:32,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:24:32,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:24:32,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:24:32,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:24:32,535 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:24:32,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:24:32,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:24:32,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:24:32,584 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:24:32,584 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:24:32,584 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:24:32,584 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:24:32,585 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:24:32,591 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:24:32,591 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:24:32,592 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:24:32,593 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:24:32,593 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:24:32,593 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:24:32,593 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:24:32,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:24:32,594 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:24:32,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:24:32,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:24:32,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:24:32,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:24:32,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:24:32,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:24:32,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:24:32,596 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:24:32,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:24:32,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:24:32,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:24:32,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:24:32,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:24:32,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:24:32,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:24:32,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:24:32,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:24:32,601 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:24:32,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:24:32,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:24:32,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:24:32,611 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:24:32,611 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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab65f956ab163b80526b0084797effd91e1aac547effeb9a1fdab821fa279e8e [2021-11-07 01:24:32,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:24:32,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:24:32,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:24:32,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:24:32,895 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:24:32,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i [2021-11-07 01:24:32,967 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/data/a787d83eb/3d3507b00c1b4ba3956a3481ed0fb69b/FLAGabba082c3 [2021-11-07 01:24:33,458 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:24:33,459 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i [2021-11-07 01:24:33,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/data/a787d83eb/3d3507b00c1b4ba3956a3481ed0fb69b/FLAGabba082c3 [2021-11-07 01:24:33,833 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/data/a787d83eb/3d3507b00c1b4ba3956a3481ed0fb69b [2021-11-07 01:24:33,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:24:33,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:24:33,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:24:33,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:24:33,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:24:33,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:33" (1/1) ... [2021-11-07 01:24:33,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d397fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:33, skipping insertion in model container [2021-11-07 01:24:33,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:33" (1/1) ... [2021-11-07 01:24:33,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:24:33,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:24:34,048 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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i[950,963] [2021-11-07 01:24:34,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:34,072 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:24:34,085 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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i[950,963] [2021-11-07 01:24:34,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:34,105 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:24:34,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34 WrapperNode [2021-11-07 01:24:34,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:24:34,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:24:34,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:24:34,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:24:34,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (1/1) ... [2021-11-07 01:24:34,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (1/1) ... [2021-11-07 01:24:34,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:24:34,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:24:34,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:24:34,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:24:34,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (1/1) ... [2021-11-07 01:24:34,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (1/1) ... [2021-11-07 01:24:34,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (1/1) ... [2021-11-07 01:24:34,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (1/1) ... [2021-11-07 01:24:34,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (1/1) ... [2021-11-07 01:24:34,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (1/1) ... [2021-11-07 01:24:34,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (1/1) ... [2021-11-07 01:24:34,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:24:34,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:24:34,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:24:34,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:24:34,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (1/1) ... [2021-11-07 01:24:34,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:24:34,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:24:34,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:24:34,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:24:34,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:24:34,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:24:34,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:24:34,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:24:34,766 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:24:34,766 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-07 01:24:34,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:34 BoogieIcfgContainer [2021-11-07 01:24:34,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:24:34,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:24:34,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:24:34,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:24:34,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:33" (1/3) ... [2021-11-07 01:24:34,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1544cae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:34, skipping insertion in model container [2021-11-07 01:24:34,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:34" (2/3) ... [2021-11-07 01:24:34,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1544cae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:34, skipping insertion in model container [2021-11-07 01:24:34,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:34" (3/3) ... [2021-11-07 01:24:34,783 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound2.i [2021-11-07 01:24:34,794 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:24:34,795 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:24:34,847 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:24:34,854 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 01:24:34,854 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:24:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 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 01:24:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:24:34,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:34,902 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:24:34,906 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:34,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:34,921 INFO L85 PathProgramCache]: Analyzing trace with hash -769700853, now seen corresponding path program 1 times [2021-11-07 01:24:34,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:24:34,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325302947] [2021-11-07 01:24:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:34,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:24:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:35,090 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 01:24:35,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:24:35,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325302947] [2021-11-07 01:24:35,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325302947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:35,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:35,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:24:35,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713444712] [2021-11-07 01:24:35,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:24:35,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:24:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:24:35,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:24:35,116 INFO L87 Difference]: Start difference. First operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 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 3.0) internal successors, (6), 2 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 01:24:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:35,131 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-11-07 01:24:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:24:35,133 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 01:24:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:35,141 INFO L225 Difference]: With dead ends: 28 [2021-11-07 01:24:35,142 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 01:24:35,144 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 01:24:35,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 01:24:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 01:24:35,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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) [2021-11-07 01:24:35,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-07 01:24:35,179 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2021-11-07 01:24:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:35,180 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-07 01:24:35,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 01:24:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-07 01:24:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:24:35,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:35,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:35,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:24:35,182 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1525818212, now seen corresponding path program 1 times [2021-11-07 01:24:35,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:24:35,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579014477] [2021-11-07 01:24:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:35,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:24:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:35,254 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 01:24:35,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:24:35,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579014477] [2021-11-07 01:24:35,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579014477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:35,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:35,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:24:35,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798509468] [2021-11-07 01:24:35,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:35,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:24:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:35,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:35,260 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:24:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:35,285 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-07 01:24:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:24:35,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2021-11-07 01:24:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:35,288 INFO L225 Difference]: With dead ends: 26 [2021-11-07 01:24:35,289 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 01:24:35,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:35,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 01:24:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-07 01:24:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-07 01:24:35,297 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2021-11-07 01:24:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:35,298 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-07 01:24:35,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:24:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-07 01:24:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:24:35,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:35,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:35,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:24:35,304 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:35,306 INFO L85 PathProgramCache]: Analyzing trace with hash 104519077, now seen corresponding path program 1 times [2021-11-07 01:24:35,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:24:35,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516019745] [2021-11-07 01:24:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:35,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:24:35,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:24:35,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126208785] [2021-11-07 01:24:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:35,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:24:35,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:24:35,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:24:35,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:24:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:35,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:24:35,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:35,735 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 01:24:35,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:35,917 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 01:24:35,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:24:35,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516019745] [2021-11-07 01:24:35,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:24:35,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126208785] [2021-11-07 01:24:35,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126208785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:35,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:35,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:35,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128871747] [2021-11-07 01:24:35,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:24:35,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:24:35,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:24:35,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:24:35,921 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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 01:24:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:38,239 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-11-07 01:24:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:24:38,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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 01:24:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:38,241 INFO L225 Difference]: With dead ends: 41 [2021-11-07 01:24:38,241 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 01:24:38,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 01:24:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-11-07 01:24:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-07 01:24:38,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 8 [2021-11-07 01:24:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:38,248 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-07 01:24:38,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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 01:24:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-07 01:24:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:24:38,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:38,249 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:38,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:38,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:24:38,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:38,464 INFO L85 PathProgramCache]: Analyzing trace with hash 653378868, now seen corresponding path program 1 times [2021-11-07 01:24:38,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:24:38,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350336702] [2021-11-07 01:24:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:38,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:24:38,487 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:24:38,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87426317] [2021-11-07 01:24:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:38,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:24:38,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:24:38,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:24:38,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:24:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:38,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:24:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:38,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:38,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:24:38,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350336702] [2021-11-07 01:24:38,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:24:38,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87426317] [2021-11-07 01:24:38,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87426317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:38,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770411475] [2021-11-07 01:24:38,720 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-07 01:24:38,721 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:24:38,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:24:38,730 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:24:38,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:24:38,767 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:38,772 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:24:38,773 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:38,773 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:24:38,777 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:24:38,778 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:38,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:24:38,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-11-07 01:24:38,820 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_24|], 10=[|v_#valid_25|]} [2021-11-07 01:24:38,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:38,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-11-07 01:24:38,854 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:38,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:24:38,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:38,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:24:38,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:24:38,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:24:38,868 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:38,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:24:38,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:38,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:24:38,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:24:38,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:38,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:38,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:38,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:38,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:38,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:38,968 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 23 treesize of output 22 [2021-11-07 01:24:38,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:38,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:24:38,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:38,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:24:38,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:24:38,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:39,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:39,014 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:39,016 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-07 01:24:39,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:24:39,018 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:238, output treesize:103 [2021-11-07 01:24:39,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:39,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-07 01:24:39,058 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.3 percent of original size [2021-11-07 01:24:39,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-07 01:24:39,076 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:39,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 01:24:39,101 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-11-07 01:24:39,113 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-11-07 01:24:39,128 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:39,138 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:24:39,150 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-11-07 01:24:39,161 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-07 01:24:39,185 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:39,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:24:39,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:39,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:39,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:39,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:39,287 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:24:40,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1770411475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:40,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:24:40,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5] total 11 [2021-11-07 01:24:40,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890317770] [2021-11-07 01:24:40,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:24:40,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:24:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:24:40,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:24:40,877 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:45,717 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-11-07 01:24:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:24:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 01:24:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:45,720 INFO L225 Difference]: With dead ends: 38 [2021-11-07 01:24:45,720 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 01:24:45,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:24:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 01:24:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-07 01:24:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 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 01:24:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-07 01:24:45,726 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 12 [2021-11-07 01:24:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:45,726 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-07 01:24:45,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-07 01:24:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:24:45,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:45,728 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:45,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:45,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:24:45,943 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:45,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1136214436, now seen corresponding path program 1 times [2021-11-07 01:24:45,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:24:45,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242048042] [2021-11-07 01:24:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:45,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:24:45,968 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:24:45,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517818956] [2021-11-07 01:24:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:45,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:24:45,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:24:45,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:24:46,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:24:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:46,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:46,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:24:46,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:24:46,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:24:46,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242048042] [2021-11-07 01:24:46,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:24:46,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517818956] [2021-11-07 01:24:46,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517818956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:46,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:46,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:24:46,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590161505] [2021-11-07 01:24:46,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:24:46,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:24:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:24:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:24:46,203 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 01:24:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:46,253 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-11-07 01:24:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:24:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 13 [2021-11-07 01:24:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:46,255 INFO L225 Difference]: With dead ends: 44 [2021-11-07 01:24:46,255 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 01:24:46,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 01:24:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-07 01:24:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-07 01:24:46,260 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2021-11-07 01:24:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:46,260 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-07 01:24:46,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 01:24:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-07 01:24:46,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:24:46,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:46,261 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:46,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:46,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:24:46,475 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:46,475 INFO L85 PathProgramCache]: Analyzing trace with hash 862871494, now seen corresponding path program 1 times [2021-11-07 01:24:46,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:24:46,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934923656] [2021-11-07 01:24:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:46,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:24:46,487 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:24:46,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937398456] [2021-11-07 01:24:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:46,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:24:46,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:24:46,489 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:24:46,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:24:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:46,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:24:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:24:46,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:47,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:24:47,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934923656] [2021-11-07 01:24:47,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:24:47,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937398456] [2021-11-07 01:24:47,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~b~0] [2021-11-07 01:24:47,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298673820] [2021-11-07 01:24:47,026 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-07 01:24:47,026 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:24:47,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:24:47,026 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:24:47,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:24:47,036 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,038 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:24:47,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:24:47,039 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:24:47,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:24:47,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-11-07 01:24:47,048 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_25|], 10=[|v_#valid_26|]} [2021-11-07 01:24:47,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:47,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2021-11-07 01:24:47,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:24:47,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:24:47,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:24:47,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:24:47,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:24:47,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:24:47,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:24:47,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:47,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:47,098 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 23 treesize of output 22 [2021-11-07 01:24:47,099 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:24:47,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:24:47,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:24:47,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-11-07 01:24:47,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:24:47,113 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:238, output treesize:103 [2021-11-07 01:24:47,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-07 01:24:47,127 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.3 percent of original size [2021-11-07 01:24:47,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-07 01:24:47,133 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,137 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-07 01:24:47,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-07 01:24:47,147 INFO L180 QuantifierPusher]: treesize reduction 5, result has 95.9 percent of original size [2021-11-07 01:24:47,150 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-07 01:24:47,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,211 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 296 [2021-11-07 01:24:47,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 301 [2021-11-07 01:24:47,246 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 299 [2021-11-07 01:24:47,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,279 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 296 [2021-11-07 01:24:47,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,369 INFO L180 QuantifierPusher]: treesize reduction 36, result has 57.6 percent of original size [2021-11-07 01:24:47,371 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:24:47,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:24:47,419 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,433 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-07 01:24:47,438 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:24:47,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-07 01:24:47,448 INFO L180 QuantifierPusher]: treesize reduction 5, result has 96.7 percent of original size [2021-11-07 01:24:47,453 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 142 [2021-11-07 01:24:47,461 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:24:49,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:24:49,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:49,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 01:24:49,332 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-07 01:24:49,332 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 01:24:49,337 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:24:49,339 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:24:49,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:49,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 01:24:49,546 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-11-07 01:24:49,548 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:24:49,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:24:49 BoogieIcfgContainer [2021-11-07 01:24:49,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:24:49,562 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:24:49,562 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:24:49,562 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:24:49,563 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:34" (3/4) ... [2021-11-07 01:24:49,565 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:24:49,565 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:24:49,566 INFO L168 Benchmark]: Toolchain (without parser) took 15725.46 ms. Allocated memory was 92.3 MB in the beginning and 119.5 MB in the end (delta: 27.3 MB). Free memory was 70.0 MB in the beginning and 88.3 MB in the end (delta: -18.3 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:24:49,567 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory is still 66.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:24:49,567 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.99 ms. Allocated memory is still 92.3 MB. Free memory was 69.9 MB in the beginning and 59.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:24:49,567 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.59 ms. Allocated memory is still 92.3 MB. Free memory was 59.7 MB in the beginning and 58.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:24:49,567 INFO L168 Benchmark]: Boogie Preprocessor took 52.97 ms. Allocated memory is still 92.3 MB. Free memory was 58.3 MB in the beginning and 57.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:24:49,568 INFO L168 Benchmark]: RCFGBuilder took 551.07 ms. Allocated memory is still 92.3 MB. Free memory was 57.2 MB in the beginning and 43.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:24:49,568 INFO L168 Benchmark]: TraceAbstraction took 14791.38 ms. Allocated memory was 92.3 MB in the beginning and 119.5 MB in the end (delta: 27.3 MB). Free memory was 42.7 MB in the beginning and 88.3 MB in the end (delta: -45.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:24:49,568 INFO L168 Benchmark]: Witness Printer took 3.54 ms. Allocated memory is still 119.5 MB. Free memory is still 88.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:24:49,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory is still 66.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.99 ms. Allocated memory is still 92.3 MB. Free memory was 69.9 MB in the beginning and 59.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.59 ms. Allocated memory is still 92.3 MB. Free memory was 59.7 MB in the beginning and 58.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.97 ms. Allocated memory is still 92.3 MB. Free memory was 58.3 MB in the beginning and 57.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 551.07 ms. Allocated memory is still 92.3 MB. Free memory was 57.2 MB in the beginning and 43.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14791.38 ms. Allocated memory was 92.3 MB in the beginning and 119.5 MB in the end (delta: 27.3 MB). Free memory was 42.7 MB in the beginning and 88.3 MB in the end (delta: -45.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.54 ms. Allocated memory is still 119.5 MB. Free memory is still 88.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * 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 - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = __VERIFIER_nondet_uint() [L16] COND TRUE !cond [L16] COND FALSE !(!cond) [L33] q = 0 [L34] r = A [L35] b = B [L36] EXPR counter++ [L36] COND TRUE counter++<2 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<2 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND FALSE !(counter++<2) [L40] EXPR counter++ [L40] COND FALSE !(counter++<2) [L19] COND TRUE !(cond) [L21] reach_error() - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 14.7s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 40 SDslu, 133 SDs, 0 SdLazy, 127 SolverSat, 16 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=5, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 444 SizeOfPredicates, 16 NumberOfNonLiveVariables, 272 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 20/27 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: OVERALL_TIME[ms]: 568, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 13, TOOLS_POST_TIME[ms]: 403, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 12, TOOLS_QUANTIFIERELIM_TIME[ms]: 393, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 257, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 25, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 1, DOMAIN_JOIN_TIME[ms]: 94, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME[ms]: 0, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME[ms]: 26, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 51, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 51, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 9, DAG_COMPRESSION_PROCESSED_NODES: 79, DAG_COMPRESSION_RETAINED_NODES: 30, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 01:24:49,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/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 ab65f956ab163b80526b0084797effd91e1aac547effeb9a1fdab821fa279e8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:24:52,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:24:52,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:24:52,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:24:52,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:24:52,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:24:52,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:24:52,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:24:52,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:24:52,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:24:52,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:24:52,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:24:52,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:24:52,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:24:52,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:24:52,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:24:52,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:24:52,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:24:52,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:24:52,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:24:52,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:24:52,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:24:52,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:24:52,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:24:52,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:24:52,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:24:52,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:24:52,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:24:52,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:24:52,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:24:52,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:24:52,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:24:52,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:24:52,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:24:52,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:24:52,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:24:52,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:24:52,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:24:52,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:24:52,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:24:52,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:24:52,190 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:24:52,235 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:24:52,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:24:52,236 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:24:52,236 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:24:52,237 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:24:52,237 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:24:52,237 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:24:52,237 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:24:52,237 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:24:52,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:24:52,240 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:24:52,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:24:52,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:24:52,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:24:52,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:24:52,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:24:52,241 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:24:52,241 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:24:52,242 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:24:52,242 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:24:52,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:24:52,242 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:24:52,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:24:52,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:24:52,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:24:52,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:24:52,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:24:52,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:24:52,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:24:52,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:24:52,244 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:24:52,244 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:52,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:24:52,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:24:52,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:24:52,245 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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab65f956ab163b80526b0084797effd91e1aac547effeb9a1fdab821fa279e8e [2021-11-07 01:24:52,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:24:52,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:24:52,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:24:52,656 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:24:52,657 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:24:52,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i [2021-11-07 01:24:52,738 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/data/689ae1753/790c0b9aa2c24c62ba4242fd3fbcd4d3/FLAGce022033b [2021-11-07 01:24:53,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:24:53,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i [2021-11-07 01:24:53,302 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/data/689ae1753/790c0b9aa2c24c62ba4242fd3fbcd4d3/FLAGce022033b [2021-11-07 01:24:53,653 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/data/689ae1753/790c0b9aa2c24c62ba4242fd3fbcd4d3 [2021-11-07 01:24:53,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:24:53,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:24:53,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:24:53,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:24:53,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:24:53,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:53,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a012d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53, skipping insertion in model container [2021-11-07 01:24:53,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:53,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:24:53,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:24:53,885 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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i[950,963] [2021-11-07 01:24:53,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:53,916 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:24:53,930 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_184b4f4b-6b28-4063-87f5-a3a7ed00e146/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i[950,963] [2021-11-07 01:24:53,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:53,976 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:24:53,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53 WrapperNode [2021-11-07 01:24:53,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:24:53,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:24:53,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:24:53,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:24:53,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:54,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:54,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:24:54,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:24:54,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:24:54,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:24:54,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:54,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:54,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:54,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:54,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:54,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:54,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:54,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:24:54,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:24:54,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:24:54,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:24:54,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (1/1) ... [2021-11-07 01:24:54,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:24:54,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:24:54,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:24:54,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:24:54,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:24:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:24:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:24:54,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:24:54,591 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:24:54,591 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-07 01:24:54,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:54 BoogieIcfgContainer [2021-11-07 01:24:54,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:24:54,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:24:54,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:24:54,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:24:54,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:53" (1/3) ... [2021-11-07 01:24:54,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19328122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:54, skipping insertion in model container [2021-11-07 01:24:54,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:53" (2/3) ... [2021-11-07 01:24:54,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19328122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:54, skipping insertion in model container [2021-11-07 01:24:54,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:54" (3/3) ... [2021-11-07 01:24:54,602 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound2.i [2021-11-07 01:24:54,607 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:24:54,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:24:54,654 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:24:54,664 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 01:24:54,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:24:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 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 01:24:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:24:54,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:54,693 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:54,694 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:54,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:54,706 INFO L85 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2021-11-07 01:24:54,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:54,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011681830] [2021-11-07 01:24:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:54,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:54,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:54,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:54,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:24:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:54,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:24:54,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:54,942 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 01:24:54,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:55,002 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 01:24:55,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:55,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011681830] [2021-11-07 01:24:55,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011681830] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:55,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:55,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:24:55,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107557967] [2021-11-07 01:24:55,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:24:55,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:24:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:24:55,027 INFO L87 Difference]: Start difference. First operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 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 5.5) internal successors, (11), 2 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) [2021-11-07 01:24:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:55,042 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-11-07 01:24:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:24:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2021-11-07 01:24:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:55,053 INFO L225 Difference]: With dead ends: 45 [2021-11-07 01:24:55,053 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 01:24:55,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 01:24:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 01:24:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-07 01:24:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 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) [2021-11-07 01:24:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-07 01:24:55,087 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-11-07 01:24:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:55,087 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-07 01:24:55,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-07 01:24:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-07 01:24:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:24:55,088 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:55,089 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:55,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:55,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:55,301 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:55,302 INFO L85 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2021-11-07 01:24:55,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:55,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924276127] [2021-11-07 01:24:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:55,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:55,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:55,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:55,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:24:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:24:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:55,471 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 01:24:55,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:55,544 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 01:24:55,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:55,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924276127] [2021-11-07 01:24:55,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924276127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:55,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:55,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:24:55,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448666205] [2021-11-07 01:24:55,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:55,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:55,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:55,549 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 01:24:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:55,589 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-07 01:24:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:24:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 12 [2021-11-07 01:24:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:55,591 INFO L225 Difference]: With dead ends: 37 [2021-11-07 01:24:55,591 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 01:24:55,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:24:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 01:24:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-07 01:24:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-07 01:24:55,598 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2021-11-07 01:24:55,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:55,599 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-07 01:24:55,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 01:24:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-07 01:24:55,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:24:55,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:55,600 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:55,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:55,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:55,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:55,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2021-11-07 01:24:55,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:55,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555706575] [2021-11-07 01:24:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:55,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:55,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:55,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:24:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:55,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:24:55,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:56,212 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 01:24:56,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:57,086 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 01:24:57,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:57,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555706575] [2021-11-07 01:24:57,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555706575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:57,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:57,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-11-07 01:24:57,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242280524] [2021-11-07 01:24:57,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:24:57,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:24:57,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:24:57,090 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-11-07 01:24:58,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:58,765 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-11-07 01:24:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:24:58,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) Word has length 13 [2021-11-07 01:24:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:58,770 INFO L225 Difference]: With dead ends: 56 [2021-11-07 01:24:58,770 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 01:24:58,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:24:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 01:24:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2021-11-07 01:24:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 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 01:24:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-07 01:24:58,784 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 13 [2021-11-07 01:24:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:58,784 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-07 01:24:58,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-11-07 01:24:58,786 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-07 01:24:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:24:58,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:58,787 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:58,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:58,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:58,999 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:59,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:59,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1639218671, now seen corresponding path program 1 times [2021-11-07 01:24:59,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:59,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390832444] [2021-11-07 01:24:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:59,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:59,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:59,003 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:59,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:24:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:24:59,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:59,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:59,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:59,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390832444] [2021-11-07 01:24:59,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390832444] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:59,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1399862282] [2021-11-07 01:24:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:59,438 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:59,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:24:59,442 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:24:59,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:24:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:59,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:24:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:59,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:59,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1399862282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:59,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188477797] [2021-11-07 01:24:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:59,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:24:59,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:24:59,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:24:59,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:24:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:59,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:24:59,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:59,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:00,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188477797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:00,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:25:00,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 16 [2021-11-07 01:25:00,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536444392] [2021-11-07 01:25:00,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:25:00,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:25:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:25:00,285 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 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 01:25:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:00,531 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-11-07 01:25:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:25:00,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 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 18 [2021-11-07 01:25:00,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:00,532 INFO L225 Difference]: With dead ends: 52 [2021-11-07 01:25:00,532 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 01:25:00,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:25:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 01:25:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-07 01:25:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0) internal successors, (19), 19 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) [2021-11-07 01:25:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2021-11-07 01:25:00,537 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 18 [2021-11-07 01:25:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:00,537 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2021-11-07 01:25:00,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 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 01:25:00,538 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2021-11-07 01:25:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:25:00,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:00,539 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:00,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:00,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:00,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-07 01:25:01,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:01,151 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:01,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash 723791097, now seen corresponding path program 1 times [2021-11-07 01:25:01,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:01,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299342413] [2021-11-07 01:25:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:01,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:01,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:01,154 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:01,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:25:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:01,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:25:01,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:25:01,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:25:01,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:01,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299342413] [2021-11-07 01:25:01,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299342413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:01,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:01,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:25:01,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457798551] [2021-11-07 01:25:01,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:25:01,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:01,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:25:01,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:25:01,646 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:01,696 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2021-11-07 01:25:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 01:25:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:01,697 INFO L225 Difference]: With dead ends: 20 [2021-11-07 01:25:01,697 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 01:25:01,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 01:25:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 01:25:01,698 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) [2021-11-07 01:25:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 01:25:01,698 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-11-07 01:25:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:01,698 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 01:25:01,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:01,699 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 01:25:01,699 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 01:25:01,701 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:25:01,702 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:25:01,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:01,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:01,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 01:25:01,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:25:01,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:25:01,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:25:01,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:25:02,324 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-11-07 01:25:02,324 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-11-07 01:25:02,324 INFO L853 garLoopResultBuilder]: At program point L19-2(line 42) the Hoare annotation is: (and (= (_ bv2 32) ~counter~0) (bvult ULTIMATE.start_main_~b~0 (_ bv2147483647 32)) (= ULTIMATE.start_main_~q~0 (_ bv0 32)) (not (bvuge ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~b~0)) (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (bvult ULTIMATE.start_main_~B~0 (_ bv2147483647 32))) [2021-11-07 01:25:02,324 INFO L857 garLoopResultBuilder]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2021-11-07 01:25:02,325 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-11-07 01:25:02,325 INFO L857 garLoopResultBuilder]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2021-11-07 01:25:02,325 INFO L860 garLoopResultBuilder]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2021-11-07 01:25:02,325 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 49) no Hoare annotation was computed. [2021-11-07 01:25:02,325 INFO L857 garLoopResultBuilder]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2021-11-07 01:25:02,325 INFO L857 garLoopResultBuilder]: For program point L36-1(lines 36 39) no Hoare annotation was computed. [2021-11-07 01:25:02,325 INFO L853 garLoopResultBuilder]: At program point L36-3(lines 36 39) the Hoare annotation is: (let ((.cse1 (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0)) (.cse0 (= ULTIMATE.start_main_~q~0 (_ bv0 32))) (.cse2 (bvult ULTIMATE.start_main_~B~0 (_ bv2147483647 32)))) (or (and (bvult ULTIMATE.start_main_~b~0 (_ bv2147483647 32)) .cse0 (= ~counter~0 (_ bv0 32)) .cse1 .cse2) (and (= (_ bv2 32) ~counter~0) .cse0 .cse1 .cse2) (and (= ~counter~0 (_ bv1 32)) .cse0 (= (bvadd (bvmul ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~b~0) ULTIMATE.start_main_~r~0) ULTIMATE.start_main_~A~0) .cse2))) [2021-11-07 01:25:02,325 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-07 01:25:02,326 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-07 01:25:02,326 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-07 01:25:02,326 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-11-07 01:25:02,326 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-11-07 01:25:02,326 INFO L857 garLoopResultBuilder]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2021-11-07 01:25:02,326 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-11-07 01:25:02,326 INFO L857 garLoopResultBuilder]: For program point L16-2(line 16) no Hoare annotation was computed. [2021-11-07 01:25:02,326 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 48) no Hoare annotation was computed. [2021-11-07 01:25:02,327 INFO L857 garLoopResultBuilder]: For program point L45-2(lines 26 52) no Hoare annotation was computed. [2021-11-07 01:25:02,327 INFO L857 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2021-11-07 01:25:02,327 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-07 01:25:02,327 INFO L860 garLoopResultBuilder]: At program point L51(lines 26 52) the Hoare annotation is: true [2021-11-07 01:25:02,331 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-11-07 01:25:02,333 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:25:02,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:25:02 BoogieIcfgContainer [2021-11-07 01:25:02,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:25:02,348 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:25:02,348 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:25:02,348 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:25:02,349 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:54" (3/4) ... [2021-11-07 01:25:02,352 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 01:25:02,363 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-07 01:25:02,364 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-07 01:25:02,364 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:25:02,364 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:25:02,410 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:25:02,410 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:25:02,412 INFO L168 Benchmark]: Toolchain (without parser) took 8746.18 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 30.9 MB in the beginning and 62.1 MB in the end (delta: -31.2 MB). Peak memory consumption was 31.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:02,412 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 54.5 MB. Free memory was 35.4 MB in the beginning and 35.4 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:25:02,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.13 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.7 MB in the beginning and 51.2 MB in the end (delta: -20.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:02,413 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.22 ms. Allocated memory is still 67.1 MB. Free memory was 51.0 MB in the beginning and 49.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:02,414 INFO L168 Benchmark]: Boogie Preprocessor took 28.23 ms. Allocated memory is still 67.1 MB. Free memory was 49.5 MB in the beginning and 48.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:25:02,414 INFO L168 Benchmark]: RCFGBuilder took 518.77 ms. Allocated memory is still 67.1 MB. Free memory was 48.3 MB in the beginning and 38.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:02,415 INFO L168 Benchmark]: TraceAbstraction took 7752.50 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 37.7 MB in the beginning and 29.4 MB in the end (delta: 8.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:02,415 INFO L168 Benchmark]: Witness Printer took 62.49 ms. Allocated memory is still 81.8 MB. Free memory was 29.4 MB in the beginning and 62.1 MB in the end (delta: -32.7 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:02,418 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 54.5 MB. Free memory was 35.4 MB in the beginning and 35.4 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.13 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.7 MB in the beginning and 51.2 MB in the end (delta: -20.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.22 ms. Allocated memory is still 67.1 MB. Free memory was 51.0 MB in the beginning and 49.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.23 ms. Allocated memory is still 67.1 MB. Free memory was 49.5 MB in the beginning and 48.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 518.77 ms. Allocated memory is still 67.1 MB. Free memory was 48.3 MB in the beginning and 38.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7752.50 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 37.7 MB in the beginning and 29.4 MB in the end (delta: 8.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 16.1 GB. * Witness Printer took 62.49 ms. Allocated memory is still 81.8 MB. Free memory was 29.4 MB in the beginning and 62.1 MB in the end (delta: -32.7 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. * 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: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 21]: 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, 24 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 7.6s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 165 SDslu, 211 SDs, 0 SdLazy, 161 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 219 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 10 NumberOfFragments, 72 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 204 ConstructedInterpolants, 0 QuantifiedInterpolants, 863 SizeOfPredicates, 22 NumberOfNonLiveVariables, 310 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 14/56 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 2 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((2bv32 == counter && ~bvult32(b, 2147483647bv32)) && q == 0bv32) && !~bvuge32(r, b)) && r == A) && cond == 1bv32) && ~bvult32(B, 2147483647bv32) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((~bvult32(b, 2147483647bv32) && q == 0bv32) && counter == 0bv32) && r == A) && ~bvult32(B, 2147483647bv32)) || (((2bv32 == counter && q == 0bv32) && r == A) && ~bvult32(B, 2147483647bv32))) || (((counter == 1bv32 && q == 0bv32) && ~bvadd64(~bvmul32(q, b), r) == A) && ~bvult32(B, 2147483647bv32)) RESULT: Ultimate proved your program to be correct! [2021-11-07 01:25:02,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184b4f4b-6b28-4063-87f5-a3a7ed00e146/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE