./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 09575df3d22e9082519fef8b3f639469f79418a93deb54dd64ac9991de61e42a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:51:37,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:51:37,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:51:37,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:51:37,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:51:37,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:51:37,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:51:37,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:51:37,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:51:37,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:51:37,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:51:37,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:51:37,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:51:37,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:51:37,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:51:37,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:51:37,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:51:37,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:51:37,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:51:37,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:51:37,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:51:37,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:51:37,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:51:37,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:51:37,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:51:37,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:51:37,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:51:37,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:51:37,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:51:37,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:51:37,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:51:37,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:51:37,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:51:37,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:51:37,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:51:37,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:51:37,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:51:37,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:51:37,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:51:37,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:51:37,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:51:37,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:51:37,270 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:51:37,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:51:37,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:51:37,271 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:51:37,272 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:51:37,272 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:51:37,272 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:51:37,272 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:51:37,278 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:51:37,278 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:51:37,279 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:51:37,280 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:51:37,280 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:51:37,280 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:51:37,280 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:51:37,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:51:37,281 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:51:37,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:51:37,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:51:37,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:51:37,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:51:37,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:51:37,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:51:37,283 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:51:37,283 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:51:37,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:51:37,283 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:51:37,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:51:37,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:51:37,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:51:37,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:37,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:51:37,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:51:37,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:51:37,286 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:51:37,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:51:37,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:51:37,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:51:37,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:51:37,287 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_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09575df3d22e9082519fef8b3f639469f79418a93deb54dd64ac9991de61e42a [2021-11-03 04:51:37,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:51:37,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:51:37,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:51:37,634 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:51:37,635 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:51:37,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2021-11-03 04:51:37,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/data/4b6ce1358/e2fa452d5ca042298b8c82e9d7c563d0/FLAG9d5fec92a [2021-11-03 04:51:38,238 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:51:38,238 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2021-11-03 04:51:38,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/data/4b6ce1358/e2fa452d5ca042298b8c82e9d7c563d0/FLAG9d5fec92a [2021-11-03 04:51:38,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/data/4b6ce1358/e2fa452d5ca042298b8c82e9d7c563d0 [2021-11-03 04:51:38,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:51:38,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:51:38,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:38,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:51:38,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:51:38,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15dc344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38, skipping insertion in model container [2021-11-03 04:51:38,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:51:38,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:51:38,799 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_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2021-11-03 04:51:38,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:38,836 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:51:38,852 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_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i[951,964] [2021-11-03 04:51:38,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:38,885 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:51:38,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38 WrapperNode [2021-11-03 04:51:38,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:38,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:51:38,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:51:38,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:51:38,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:51:38,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:51:38,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:51:38,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:51:38,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:51:38,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:51:38,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:51:38,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:51:38,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (1/1) ... [2021-11-03 04:51:38,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:38,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:38,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:51:39,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:51:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:51:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:51:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:51:39,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:51:41,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:51:41,569 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-03 04:51:41,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:51:41 BoogieIcfgContainer [2021-11-03 04:51:41,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:51:41,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:51:41,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:51:41,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:51:41,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:51:38" (1/3) ... [2021-11-03 04:51:41,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2a580e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:51:41, skipping insertion in model container [2021-11-03 04:51:41,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:38" (2/3) ... [2021-11-03 04:51:41,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2a580e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:51:41, skipping insertion in model container [2021-11-03 04:51:41,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:51:41" (3/3) ... [2021-11-03 04:51:41,589 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i [2021-11-03 04:51:41,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:51:41,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 04:51:41,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:51:41,667 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:51:41,667 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 04:51:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 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) [2021-11-03 04:51:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:51:41,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:41,701 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:51:41,701 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash 104093823, now seen corresponding path program 1 times [2021-11-03 04:51:41,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:51:41,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244944283] [2021-11-03 04:51:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:41,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:51:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:41,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:51:41,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244944283] [2021-11-03 04:51:41,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244944283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:51:41,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:51:41,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:51:41,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004201096] [2021-11-03 04:51:41,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:51:41,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:51:41,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:51:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:51:41,873 INFO L87 Difference]: Start difference. First operand has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:41,885 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-11-03 04:51:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:51:41,886 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 04:51:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:41,893 INFO L225 Difference]: With dead ends: 25 [2021-11-03 04:51:41,893 INFO L226 Difference]: Without dead ends: 12 [2021-11-03 04:51:41,896 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 [2021-11-03 04:51:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-03 04:51:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-03 04:51:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-03 04:51:41,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2021-11-03 04:51:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:41,923 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-03 04:51:41,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-03 04:51:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:51:41,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:41,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:51:41,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:51:41,924 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:41,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:41,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1128477837, now seen corresponding path program 1 times [2021-11-03 04:51:41,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:51:41,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475277420] [2021-11-03 04:51:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:41,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:51:41,943 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:51:41,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431477575] [2021-11-03 04:51:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:41,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:41,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:41,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:51:41,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:51:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:42,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:51:42,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:42,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:42,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:51:42,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475277420] [2021-11-03 04:51:42,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:51:42,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431477575] [2021-11-03 04:51:42,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431477575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:51:42,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:51:42,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:51:42,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487683150] [2021-11-03 04:51:42,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:51:42,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:51:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:51:42,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:51:42,474 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:44,768 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-03 04:51:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:51:44,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:51:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:44,771 INFO L225 Difference]: With dead ends: 30 [2021-11-03 04:51:44,771 INFO L226 Difference]: Without dead ends: 22 [2021-11-03 04:51:44,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:51:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-03 04:51:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-11-03 04:51:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-03 04:51:44,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 6 [2021-11-03 04:51:44,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:44,777 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-03 04:51:44,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:44,778 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-03 04:51:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:51:44,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:44,778 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:51:44,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:44,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:44,994 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1768313588, now seen corresponding path program 1 times [2021-11-03 04:51:44,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:51:44,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802543381] [2021-11-03 04:51:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:44,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:51:45,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:51:45,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730008594] [2021-11-03 04:51:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:45,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:45,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:45,017 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:51:45,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 04:51:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:45,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:51:45,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:45,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:45,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:51:45,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802543381] [2021-11-03 04:51:45,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:51:45,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730008594] [2021-11-03 04:51:45,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730008594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:51:45,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:51:45,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:51:45,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607259598] [2021-11-03 04:51:45,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:51:45,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:51:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:51:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:51:45,190 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:45,226 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-11-03 04:51:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:51:45,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 9 [2021-11-03 04:51:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:45,228 INFO L225 Difference]: With dead ends: 31 [2021-11-03 04:51:45,228 INFO L226 Difference]: Without dead ends: 19 [2021-11-03 04:51:45,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:51:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-03 04:51:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-03 04:51:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:45,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-03 04:51:45,233 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-11-03 04:51:45,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:45,233 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-03 04:51:45,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:45,233 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-03 04:51:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:51:45,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:45,234 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2021-11-03 04:51:45,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:45,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:45,467 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:45,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1710175895, now seen corresponding path program 1 times [2021-11-03 04:51:45,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:51:45,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161569050] [2021-11-03 04:51:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:45,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:51:45,484 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:51:45,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112990503] [2021-11-03 04:51:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:45,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:45,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:45,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:51:45,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 04:51:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:45,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:51:45,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:45,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:45,720 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:51:45,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161569050] [2021-11-03 04:51:45,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:51:45,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112990503] [2021-11-03 04:51:45,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112990503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:45,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503048486] [2021-11-03 04:51:45,740 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-03 04:51:45,740 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:51:45,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:51:45,749 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:51:45,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:51:45,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:45,781 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:51:45,782 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:45,782 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-03 04:51:45,785 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:51:45,786 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:45,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:51:45,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-03 04:51:45,830 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 10=[|v_#valid_17|]} [2021-11-03 04:51:45,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:45,868 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 [2021-11-03 04:51:45,868 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:45,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 04:51:45,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:45,870 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 04:51:45,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:51:45,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 04:51:45,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:45,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:51:45,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:45,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:51:45,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:51:45,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:45,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:45,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:45,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:45,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:45,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:45,987 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 [2021-11-03 04:51:45,988 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:45,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:51:45,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:46,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:51:46,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 04:51:46,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:46,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:46,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-03 04:51:46,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:51:46,042 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:228, output treesize:98 [2021-11-03 04:51:46,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:46,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-03 04:51:46,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:46,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-11-03 04:51:46,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:46,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 292 [2021-11-03 04:51:46,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:51:46,378 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:51:48,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1503048486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:51:48,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:51:48,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3] total 9 [2021-11-03 04:51:48,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389216781] [2021-11-03 04:51:48,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:51:48,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:51:48,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:51:48,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:51:48,641 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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) [2021-11-03 04:51:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:50,826 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-11-03 04:51:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:51:50,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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 10 [2021-11-03 04:51:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:50,827 INFO L225 Difference]: With dead ends: 28 [2021-11-03 04:51:50,827 INFO L226 Difference]: Without dead ends: 17 [2021-11-03 04:51:50,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:51:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-03 04:51:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-03 04:51:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-03 04:51:50,833 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2021-11-03 04:51:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:50,833 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-03 04:51:50,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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) [2021-11-03 04:51:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-03 04:51:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:51:50,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:50,834 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:51:50,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-03 04:51:51,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:51,050 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:51,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:51,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1522972369, now seen corresponding path program 1 times [2021-11-03 04:51:51,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:51:51,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159904559] [2021-11-03 04:51:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:51,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:51:51,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:51:51,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511855411] [2021-11-03 04:51:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:51,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:51,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:51,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:51:51,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aaed8ac-70db-4b09-8008-9ebe9d66a1b5/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process