./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_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_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/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_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/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_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/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 f2c97cfaf178ecbb63eaaf825cd5ea4b5be1bf37ecd5b20cf7e400328e1cd168 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:03:00,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:03:00,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:03:00,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:03:00,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:03:00,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:03:00,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:03:00,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:03:00,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:03:00,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:03:00,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:03:00,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:03:00,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:03:00,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:03:00,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:03:00,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:03:00,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:03:00,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:03:00,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:03:00,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:03:00,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:03:00,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:03:00,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:03:00,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:03:00,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:03:00,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:03:00,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:03:00,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:03:00,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:03:00,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:03:00,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:03:00,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:03:00,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:03:00,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:03:00,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:03:00,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:03:00,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:03:00,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:03:00,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:03:00,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:03:00,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:03:00,824 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:03:00,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:03:00,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:03:00,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:03:00,877 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:03:00,877 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:03:00,877 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:03:00,878 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:03:00,878 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:03:00,878 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:03:00,878 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:03:00,879 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:03:00,879 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:03:00,880 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:03:00,880 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:03:00,880 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:03:00,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:03:00,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:03:00,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:03:00,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:03:00,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:03:00,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:03:00,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:03:00,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:03:00,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:03:00,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:03:00,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:03:00,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:03:00,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:03:00,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:03:00,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:03:00,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:00,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:03:00,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:03:00,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:03:00,885 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:03:00,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:03:00,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:03:00,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:03:00,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:03:00,886 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_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2c97cfaf178ecbb63eaaf825cd5ea4b5be1bf37ecd5b20cf7e400328e1cd168 [2021-11-07 01:03:01,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:03:01,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:03:01,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:03:01,244 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:03:01,245 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:03:01,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2021-11-07 01:03:01,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/data/1e3efbca1/a237d95aa3674f13aeedcde4651aa42e/FLAG76804da09 [2021-11-07 01:03:01,906 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:03:01,907 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2021-11-07 01:03:01,920 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/data/1e3efbca1/a237d95aa3674f13aeedcde4651aa42e/FLAG76804da09 [2021-11-07 01:03:02,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/data/1e3efbca1/a237d95aa3674f13aeedcde4651aa42e [2021-11-07 01:03:02,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:03:02,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:03:02,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:02,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:03:02,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:03:02,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682e97d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02, skipping insertion in model container [2021-11-07 01:03:02,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:03:02,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:02,468 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_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2021-11-07 01:03:02,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:02,512 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:03:02,526 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_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2021-11-07 01:03:02,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:02,546 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:03:02,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02 WrapperNode [2021-11-07 01:03:02,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:02,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:02,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:03:02,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:03:02,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:02,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:03:02,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:03:02,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:03:02,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:03:02,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:03:02,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:03:02,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:03:02,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (1/1) ... [2021-11-07 01:03:02,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:02,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:02,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:03:02,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:03:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:03:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:03:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:03:02,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:03:05,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:03:05,054 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-07 01:03:05,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:05 BoogieIcfgContainer [2021-11-07 01:03:05,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:03:05,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:03:05,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:03:05,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:03:05,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:03:02" (1/3) ... [2021-11-07 01:03:05,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297a208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:05, skipping insertion in model container [2021-11-07 01:03:05,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:02" (2/3) ... [2021-11-07 01:03:05,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297a208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:05, skipping insertion in model container [2021-11-07 01:03:05,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:05" (3/3) ... [2021-11-07 01:03:05,064 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound2.i [2021-11-07 01:03:05,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:03:05,070 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:03:05,114 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:03:05,125 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 01:03:05,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:03:05,140 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 01:03:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:03:05,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:05,146 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:03:05,147 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1384273294, now seen corresponding path program 1 times [2021-11-07 01:03:05,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:05,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651639450] [2021-11-07 01:03:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:05,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:05,384 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 01:03:05,384 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:05,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651639450] [2021-11-07 01:03:05,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651639450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:05,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:05,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:03:05,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453228576] [2021-11-07 01:03:05,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:03:05,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:03:05,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:03:05,418 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 01:03:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:05,435 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-11-07 01:03:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:03:05,436 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 01:03:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:05,447 INFO L225 Difference]: With dead ends: 28 [2021-11-07 01:03:05,447 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 01:03:05,452 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 01:03:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 01:03:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 01:03:05,486 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 01:03:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-07 01:03:05,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2021-11-07 01:03:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:05,491 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-07 01:03:05,491 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 01:03:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-07 01:03:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:03:05,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:05,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:05,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:03:05,494 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:05,499 INFO L85 PathProgramCache]: Analyzing trace with hash -346058289, now seen corresponding path program 1 times [2021-11-07 01:03:05,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:05,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635355753] [2021-11-07 01:03:05,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:05,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:05,669 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 01:03:05,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:05,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635355753] [2021-11-07 01:03:05,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635355753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:05,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:05,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:03:05,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630536794] [2021-11-07 01:03:05,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:05,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:05,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:05,692 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 01:03:05,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:05,727 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-07 01:03:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:05,728 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 01:03:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:05,729 INFO L225 Difference]: With dead ends: 26 [2021-11-07 01:03:05,729 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 01:03:05,731 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 01:03:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 01:03:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-07 01:03:05,770 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 01:03:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-07 01:03:05,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2021-11-07 01:03:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:05,772 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-07 01:03:05,772 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 01:03:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-07 01:03:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:03:05,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:05,774 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:05,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:03:05,774 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2089077620, now seen corresponding path program 1 times [2021-11-07 01:03:05,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:05,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279888361] [2021-11-07 01:03:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:05,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:05,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:03:05,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473799971] [2021-11-07 01:03:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:05,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:05,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:05,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:05,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:03:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:03:05,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:06,254 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 01:03:06,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:06,509 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 01:03:06,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:06,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279888361] [2021-11-07 01:03:06,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:03:06,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473799971] [2021-11-07 01:03:06,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473799971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:06,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:06,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:03:06,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270650655] [2021-11-07 01:03:06,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:03:06,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:06,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:03:06,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:03:06,514 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 01:03:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:09,053 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-11-07 01:03:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:03:09,055 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 01:03:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:09,058 INFO L225 Difference]: With dead ends: 38 [2021-11-07 01:03:09,058 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 01:03:09,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:03:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 01:03:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-07 01:03:09,063 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 01:03:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-07 01:03:09,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 8 [2021-11-07 01:03:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:09,064 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-07 01:03:09,064 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 01:03:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-07 01:03:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:03:09,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:09,066 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:09,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:09,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:09,267 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:09,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1026504725, now seen corresponding path program 1 times [2021-11-07 01:03:09,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:09,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113912697] [2021-11-07 01:03:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:09,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:09,280 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:03:09,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583746395] [2021-11-07 01:03:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:09,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:09,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:09,283 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:09,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:03:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:03:09,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:09,440 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 01:03:09,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:09,497 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 01:03:09,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:09,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113912697] [2021-11-07 01:03:09,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:03:09,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583746395] [2021-11-07 01:03:09,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583746395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:09,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283215039] [2021-11-07 01:03:09,527 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-07 01:03:09,528 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:03:09,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:03:09,551 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:03:09,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:03:09,600 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,606 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:03:09,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:03:09,613 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:03:09,614 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:03:09,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-11-07 01:03:09,651 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-11-07 01:03:09,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:09,685 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 01:03:09,686 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,686 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:03:09,687 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,687 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:03:09,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:03:09,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:03:09,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:09,776 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 01:03:09,778 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,782 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:03:09,783 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:03:09,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:03:09,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:03:09,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,824 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-07 01:03:09,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:03:09,825 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:101, output treesize:86 [2021-11-07 01:03:09,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-07 01:03:09,842 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.8 percent of original size [2021-11-07 01:03:09,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-07 01:03:09,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-07 01:03:09,888 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.1 percent of original size [2021-11-07 01:03:09,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-07 01:03:09,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:03:09,933 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:09,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:03:09,942 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:03:11,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1283215039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:11,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:03:11,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5] total 11 [2021-11-07 01:03:11,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789636566] [2021-11-07 01:03:11,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:11,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:11,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:11,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:03:11,063 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 01:03:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:11,215 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-11-07 01:03:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:03:11,216 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 01:03:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:11,217 INFO L225 Difference]: With dead ends: 38 [2021-11-07 01:03:11,217 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 01:03:11,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:03:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 01:03:11,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-07 01:03:11,221 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 01:03:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-07 01:03:11,222 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 12 [2021-11-07 01:03:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:11,222 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-07 01:03:11,223 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 01:03:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-07 01:03:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:03:11,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:11,224 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:11,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:11,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:11,439 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:11,440 INFO L85 PathProgramCache]: Analyzing trace with hash -10010993, now seen corresponding path program 1 times [2021-11-07 01:03:11,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:11,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415738640] [2021-11-07 01:03:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:11,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:11,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:03:11,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235134082] [2021-11-07 01:03:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:11,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:11,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:11,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:11,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:03:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:11,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:03:11,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:11,574 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 01:03:11,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:11,649 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 01:03:11,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:11,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415738640] [2021-11-07 01:03:11,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:03:11,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235134082] [2021-11-07 01:03:11,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235134082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:11,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:11,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:03:11,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281317215] [2021-11-07 01:03:11,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:11,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:11,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:11,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:11,656 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 01:03:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:11,700 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-11-07 01:03:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:11,701 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 01:03:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:11,702 INFO L225 Difference]: With dead ends: 44 [2021-11-07 01:03:11,702 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 01:03:11,703 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 01:03:11,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 01:03:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-07 01:03:11,706 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 01:03:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-07 01:03:11,707 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2021-11-07 01:03:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:11,708 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-07 01:03:11,708 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 01:03:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-07 01:03:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:03:11,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:11,709 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:11,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:11,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:11,933 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:11,933 INFO L85 PathProgramCache]: Analyzing trace with hash -310378451, now seen corresponding path program 1 times [2021-11-07 01:03:11,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:11,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582354192] [2021-11-07 01:03:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:11,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:11,948 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:03:11,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262121114] [2021-11-07 01:03:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:11,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:11,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:11,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:11,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:03:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:12,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:03:12,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:12,173 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 01:03:12,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:12,431 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 01:03:12,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:12,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582354192] [2021-11-07 01:03:12,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:03:12,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262121114] [2021-11-07 01:03:12,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262121114] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:12,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:12,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:03:12,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011411887] [2021-11-07 01:03:12,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:12,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:12,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:12,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:12,437 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:12,492 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-07 01:03:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:12,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:03:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:12,493 INFO L225 Difference]: With dead ends: 40 [2021-11-07 01:03:12,493 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 01:03:12,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 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 01:03:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 01:03:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2021-11-07 01:03:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 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 01:03:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-07 01:03:12,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2021-11-07 01:03:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:12,498 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-07 01:03:12,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-07 01:03:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:03:12,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:12,500 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:12,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:12,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:12,723 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2052410893, now seen corresponding path program 1 times [2021-11-07 01:03:12,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:12,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406513521] [2021-11-07 01:03:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:12,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:12,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:03:12,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111911490] [2021-11-07 01:03:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:12,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:12,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:12,735 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:12,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:03:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:12,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:03:12,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:12,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:12,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:12,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406513521] [2021-11-07 01:03:12,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:03:12,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111911490] [2021-11-07 01:03:12,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111911490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:12,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:12,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:03:12,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170292604] [2021-11-07 01:03:12,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:03:12,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:12,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:03:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:03:12,942 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:12,961 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-07 01:03:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:03:12,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:03:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:12,961 INFO L225 Difference]: With dead ends: 22 [2021-11-07 01:03:12,962 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 01:03:12,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:03:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 01:03:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 01:03:12,963 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 01:03:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 01:03:12,963 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-11-07 01:03:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:12,963 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 01:03:12,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 01:03:12,964 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 01:03:12,966 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:03:12,967 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:03:13,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:13,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:13,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 01:03:13,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:03:13,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:03:13,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:03:13,522 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-11-07 01:03:13,522 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-11-07 01:03:13,523 INFO L853 garLoopResultBuilder]: At program point L19-2(line 40) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |#t~string0.base|))) (and (= |ULTIMATE.start___VERIFIER_assert_#in~cond| ULTIMATE.start___VERIFIER_assert_~cond) (= (select |#valid| |#t~string1.base|) 1) (< |#StackHeapBarrier| |#t~string1.base|) (< (mod ULTIMATE.start_main_~r~0 4294967296) (mod ULTIMATE.start_main_~b~0 4294967296)) (= (select .cse0 (+ |#t~string0.offset| 1)) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond| 1) (= 2 (select |#length| |#t~string0.base|)) (= ULTIMATE.start_main_~B~0 1) (= ULTIMATE.start_main_~A~0 ULTIMATE.start_main_~r~0) (= ULTIMATE.start_main_~q~0 0) (= (select |#valid| 0) 0) (= (select |#valid| |#t~string0.base|) 1) (= |#NULL.offset| 0) (< |#StackHeapBarrier| |#t~string0.base|) (= (select |#length| |#t~string1.base|) 10) (= ULTIMATE.start_main_~B~0 ULTIMATE.start_main_~b~0) (= 48 (select .cse0 |#t~string0.offset|)) (= |#t~string1.offset| 0) (= ~counter~0 2) (= |#t~string0.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2021-11-07 01:03:13,523 INFO L857 garLoopResultBuilder]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2021-11-07 01:03:13,523 INFO L860 garLoopResultBuilder]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2021-11-07 01:03:13,523 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-07 01:03:13,523 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-11-07 01:03:13,523 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-11-07 01:03:13,524 INFO L857 garLoopResultBuilder]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2021-11-07 01:03:13,524 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-07 01:03:13,524 INFO L857 garLoopResultBuilder]: For program point L38(lines 38 47) no Hoare annotation was computed. [2021-11-07 01:03:13,524 INFO L857 garLoopResultBuilder]: For program point L38-2(lines 38 47) no Hoare annotation was computed. [2021-11-07 01:03:13,524 INFO L857 garLoopResultBuilder]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2021-11-07 01:03:13,524 INFO L853 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~A~0 ULTIMATE.start_main_~r~0)) (.cse1 (= ULTIMATE.start_main_~q~0 0))) (or (and (<= 1 ~counter~0) .cse0 .cse1) (let ((.cse2 (select |#memory_int| |#t~string0.base|))) (and (= (select |#valid| |#t~string1.base|) 1) (< |#StackHeapBarrier| |#t~string1.base|) (= (select .cse2 (+ |#t~string0.offset| 1)) 0) (= 2 (select |#length| |#t~string0.base|)) .cse0 (= ~counter~0 0) (= ULTIMATE.start_main_~b~0 1) .cse1 (= (select |#valid| 0) 0) (= (select |#valid| |#t~string0.base|) 1) (= |#NULL.offset| 0) (< |#StackHeapBarrier| |#t~string0.base|) (= (select |#length| |#t~string1.base|) 10) (= ULTIMATE.start_main_~B~0 ULTIMATE.start_main_~b~0) (= 48 (select .cse2 |#t~string0.offset|)) (= |#t~string1.offset| 0) (= |#t~string0.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2021-11-07 01:03:13,524 INFO L857 garLoopResultBuilder]: For program point L43-2(lines 26 50) no Hoare annotation was computed. [2021-11-07 01:03:13,524 INFO L857 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2021-11-07 01:03:13,527 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:13,529 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:03:13,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:03:13 BoogieIcfgContainer [2021-11-07 01:03:13,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:03:13,550 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:03:13,550 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:03:13,550 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:03:13,551 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:05" (3/4) ... [2021-11-07 01:03:13,554 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 01:03:13,562 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-07 01:03:13,563 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-07 01:03:13,563 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-07 01:03:13,563 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:03:13,588 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((((\old(cond) == cond && \valid["divbin2.c"] == 1) && unknown-#StackHeapBarrier-unknown < "divbin2.c") && r % 4294967296 < b % 4294967296) && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && B == 1) && A == r) && q == 0) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["divbin2.c"] == 10) && B == b) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "divbin2.c" == 0) && counter == 2) && "0" == 0) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 [2021-11-07 01:03:13,623 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:03:13,624 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:03:13,625 INFO L168 Benchmark]: Toolchain (without parser) took 11373.50 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 50.2 MB in the beginning and 85.4 MB in the end (delta: -35.2 MB). Peak memory consumption was 35.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:13,627 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory was 66.5 MB in the beginning and 66.4 MB in the end (delta: 43.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:03:13,628 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.93 ms. Allocated memory is still 90.2 MB. Free memory was 50.0 MB in the beginning and 66.7 MB in the end (delta: -16.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:13,628 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.25 ms. Allocated memory is still 90.2 MB. Free memory was 66.7 MB in the beginning and 65.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:13,629 INFO L168 Benchmark]: Boogie Preprocessor took 21.22 ms. Allocated memory is still 90.2 MB. Free memory was 65.1 MB in the beginning and 64.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:13,629 INFO L168 Benchmark]: RCFGBuilder took 2453.31 ms. Allocated memory is still 90.2 MB. Free memory was 64.0 MB in the beginning and 52.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:13,629 INFO L168 Benchmark]: TraceAbstraction took 8491.52 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 51.7 MB in the beginning and 37.2 MB in the end (delta: 14.5 MB). Peak memory consumption was 35.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:13,631 INFO L168 Benchmark]: Witness Printer took 74.03 ms. Allocated memory is still 109.1 MB. Free memory was 37.2 MB in the beginning and 85.4 MB in the end (delta: -48.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:13,634 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory was 66.5 MB in the beginning and 66.4 MB in the end (delta: 43.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 281.93 ms. Allocated memory is still 90.2 MB. Free memory was 50.0 MB in the beginning and 66.7 MB in the end (delta: -16.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.25 ms. Allocated memory is still 90.2 MB. Free memory was 66.7 MB in the beginning and 65.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.22 ms. Allocated memory is still 90.2 MB. Free memory was 65.1 MB in the beginning and 64.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2453.31 ms. Allocated memory is still 90.2 MB. Free memory was 64.0 MB in the beginning and 52.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8491.52 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 51.7 MB in the beginning and 37.2 MB in the end (delta: 14.5 MB). Peak memory consumption was 35.4 MB. Max. memory is 16.1 GB. * Witness Printer took 74.03 ms. Allocated memory is still 109.1 MB. Free memory was 37.2 MB in the beginning and 85.4 MB in the end (delta: -48.2 MB). Peak memory consumption was 4.2 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, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 8.4s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 88 SDtfs, 51 SDslu, 176 SDs, 0 SdLazy, 167 SolverSat, 20 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=5, InterpolantAutomatonStates: 37, 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, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 7 NumberOfFragments, 181 HoareAnnotationTreeSize, 3 FomulaSimplifications, 53 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 125 ConstructedInterpolants, 11 QuantifiedInterpolants, 543 SizeOfPredicates, 16 NumberOfNonLiveVariables, 331 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 12 InterpolantComputations, 10 PerfectInterpolantSequences, 44/46 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]: 415, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 10, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 13, TOOLS_POST_TIME[ms]: 324, 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: 11, TOOLS_QUANTIFIERELIM_TIME[ms]: 316, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 232, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 25, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, 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: 10, DOMAIN_ISBOTTOM_TIME[ms]: 23, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 17, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 17, 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]: 5, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 11, DAG_COMPRESSION_PROCESSED_NODES: 89, DAG_COMPRESSION_RETAINED_NODES: 31, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((((((((((((\old(cond) == cond && \valid["divbin2.c"] == 1) && unknown-#StackHeapBarrier-unknown < "divbin2.c") && r % 4294967296 < b % 4294967296) && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && \old(cond) == 1) && 2 == unknown-#length-unknown["0"]) && B == 1) && A == r) && q == 0) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["divbin2.c"] == 10) && B == b) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "divbin2.c" == 0) && counter == 2) && "0" == 0) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((1 <= counter && A == r) && q == 0) || ((((((((((((((((((\valid["divbin2.c"] == 1 && unknown-#StackHeapBarrier-unknown < "divbin2.c") && unknown-#memory_int-unknown["0"]["0" + 1] == 0) && 2 == unknown-#length-unknown["0"]) && A == r) && counter == 0) && b == 1) && q == 0) && \valid[0] == 0) && \valid["0"] == 1) && #NULL == 0) && unknown-#StackHeapBarrier-unknown < "0") && unknown-#length-unknown["divbin2.c"] == 10) && B == b) && 48 == unknown-#memory_int-unknown["0"]["0"]) && "divbin2.c" == 0) && "0" == 0) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) RESULT: Ultimate proved your program to be correct! [2021-11-07 01:03:13,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b4ba7e-7e3c-4f67-96b0-2bf05884a2a0/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